1541386997 has 2 divisors, whose sum is σ = 1541386998. Its totient is φ = 1541386996.

The previous prime is 1541386993. The next prime is 1541387051. The reversal of 1541386997 is 7996831451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 852114481 + 689272516 = 29191^2 + 26254^2 .

It is a cyclic number.

It is not a de Polignac number, because 1541386997 - 2² = 1541386993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1541386993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770693498 + 770693499.

It is an arithmetic number, because the mean of its divisors is an integer number (770693499).

Almost surely, 2^1541386997 is an apocalyptic number.

It is an amenable number.

1541386997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541386997 is an equidigital number, since it uses as much as digits as its factorization.

1541386997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 1541386997 is about 39260.5017415723. The cubic root of 1541386997 is about 1155.1469355740.

The spelling of 1541386997 in words is "one billion, five hundred forty-one million, three hundred eighty-six thousand, nine hundred ninety-seven".