845977949 has 2 divisors, whose sum is σ = 845977950. Its totient is φ = 845977948.

The previous prime is 845977933. The next prime is 845977961. The reversal of 845977949 is 949779548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 818989924 + 26988025 = 28618^2 + 5195^2 .

It is a cyclic number.

It is not a de Polignac number, because 845977949 - 2⁴ = 845977933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 845977891 and 845977900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845977849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422988974 + 422988975.

It is an arithmetic number, because the mean of its divisors is an integer number (422988975).

Almost surely, 2^845977949 is an apocalyptic number.

It is an amenable number.

845977949 is a deficient number, since it is larger than the sum of its proper divisors (1).

845977949 is an equidigital number, since it uses as much as digits as its factorization.

845977949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 62.

The square root of 845977949 is about 29085.7000775295. The cubic root of 845977949 is about 945.7717719451.

The spelling of 845977949 in words is "eight hundred forty-five million, nine hundred seventy-seven thousand, nine hundred forty-nine".