905157031 has 2 divisors, whose sum is σ = 905157032. Its totient is φ = 905157030.

The previous prime is 905157023. The next prime is 905157049. The reversal of 905157031 is 130751509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 905157031 - 2³ = 905157023 is a prime.

It is a super-2 number, since 2×905157031² = 1638618501537469922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 905156984 and 905157002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (905157931) 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, 452578515 + 452578516.

It is an arithmetic number, because the mean of its divisors is an integer number (452578516).

Almost surely, 2^905157031 is an apocalyptic number.

905157031 is a deficient number, since it is larger than the sum of its proper divisors (1).

905157031 is an equidigital number, since it uses as much as digits as its factorization.

905157031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 905157031 is about 30085.8277433080. The cubic root of 905157031 is about 967.3299693412.

The spelling of 905157031 in words is "nine hundred five million, one hundred fifty-seven thousand, thirty-one".