91125437 has 8 divisors (see below), whose sum is σ = 98249760. Its totient is φ = 84017520.

The previous prime is 91125431. The next prime is 91125449. The reversal of 91125437 is 73452119.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91125437 - 2²² = 86931133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91125431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9014 + ... + 16232.

It is an arithmetic number, because the mean of its divisors is an integer number (12281220).

Almost surely, 2^91125437 is an apocalyptic number.

It is an amenable number.

91125437 is a deficient number, since it is larger than the sum of its proper divisors (7124323).

91125437 is a wasteful number, since it uses less digits than its factorization.

91125437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8203.

The product of its digits is 7560, while the sum is 32.

The square root of 91125437 is about 9545.9644352993. The cubic root of 91125437 is about 450.0007193404. Note that the first 3 decimals are identical.

The spelling of 91125437 in words is "ninety-one million, one hundred twenty-five thousand, four hundred thirty-seven".