91504031 has 2 divisors, whose sum is σ = 91504032. Its totient is φ = 91504030.

The previous prime is 91504009. The next prime is 91504069. The reversal of 91504031 is 13040519.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91504031 - 2¹⁰ = 91503007 is a prime.

It is a super-2 number, since 2×91504031² = 16745975378497922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91503988 and 91504006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91504001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45752015 + 45752016.

It is an arithmetic number, because the mean of its divisors is an integer number (45752016).

Almost surely, 2^91504031 is an apocalyptic number.

91504031 is a deficient number, since it is larger than the sum of its proper divisors (1).

91504031 is an equidigital number, since it uses as much as digits as its factorization.

91504031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 91504031 is about 9565.7739362793. The cubic root of 91504031 is about 450.6230562787.

The spelling of 91504031 in words is "ninety-one million, five hundred four thousand, thirty-one".