91925437 has 2 divisors, whose sum is σ = 91925438. Its totient is φ = 91925436.

The previous prime is 91925429. The next prime is 91925459. The reversal of 91925437 is 73452919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89510521 + 2414916 = 9461^2 + 1554^2 .

It is a cyclic number.

It is not a de Polignac number, because 91925437 - 2³ = 91925429 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 91925437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91925417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45962718 + 45962719.

It is an arithmetic number, because the mean of its divisors is an integer number (45962719).

Almost surely, 2^91925437 is an apocalyptic number.

It is an amenable number.

91925437 is a deficient number, since it is larger than the sum of its proper divisors (1).

91925437 is an equidigital number, since it uses as much as digits as its factorization.

91925437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 91925437 is about 9587.7753936980. The cubic root of 91925437 is about 451.3137526018.

The spelling of 91925437 in words is "ninety-one million, nine hundred twenty-five thousand, four hundred thirty-seven".