1977267049 has 2 divisors, whose sum is σ = 1977267050. Its totient is φ = 1977267048.

The previous prime is 1977267043. The next prime is 1977267073. The reversal of 1977267049 is 9407627791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1418275600 + 558991449 = 37660^2 + 23643^2 .

It is an emirp because it is prime and its reverse (9407627791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1977267049 - 2¹⁷ = 1977135977 is a prime.

It is a super-2 number, since 2×1977267049² = 7819169966122336802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1977266987 and 1977267005.

It is not a weakly prime, because it can be changed into another prime (1977267043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988633524 + 988633525.

It is an arithmetic number, because the mean of its divisors is an integer number (988633525).

Almost surely, 2^1977267049 is an apocalyptic number.

It is an amenable number.

1977267049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977267049 is an equidigital number, since it uses as much as digits as its factorization.

1977267049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1333584, while the sum is 52.

The square root of 1977267049 is about 44466.4710652869. The cubic root of 1977267049 is about 1255.1292278161.

The spelling of 1977267049 in words is "one billion, nine hundred seventy-seven million, two hundred sixty-seven thousand, forty-nine".