403138537 has 2 divisors, whose sum is σ = 403138538. Its totient is φ = 403138536.

The previous prime is 403138451. The next prime is 403138559. The reversal of 403138537 is 735831304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222934761 + 180203776 = 14931^2 + 13424^2 .

It is a cyclic number.

It is not a de Polignac number, because 403138537 - 2²⁷ = 268920809 is a prime.

It is not a weakly prime, because it can be changed into another prime (403138577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201569268 + 201569269.

It is an arithmetic number, because the mean of its divisors is an integer number (201569269).

Almost surely, 2^403138537 is an apocalyptic number.

It is an amenable number.

403138537 is a deficient number, since it is larger than the sum of its proper divisors (1).

403138537 is an equidigital number, since it uses as much as digits as its factorization.

403138537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 403138537 is about 20078.3101131544. The cubic root of 403138537 is about 738.7283596071.

The spelling of 403138537 in words is "four hundred three million, one hundred thirty-eight thousand, five hundred thirty-seven".