91425291 has 8 divisors (see below), whose sum is σ = 122012880. Its totient is φ = 60893952.

The previous prime is 91425287. The next prime is 91425307. The reversal of 91425291 is 19252419.

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

It is not a de Polignac number, because 91425291 - 2² = 91425287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91425211) 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, 10110 + ... + 16883.

It is an arithmetic number, because the mean of its divisors is an integer number (15251610).

Almost surely, 2^91425291 is an apocalyptic number.

91425291 is a deficient number, since it is larger than the sum of its proper divisors (30587589).

91425291 is a wasteful number, since it uses less digits than its factorization.

91425291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28125.

The product of its digits is 6480, while the sum is 33.

The square root of 91425291 is about 9561.6573354205. The cubic root of 91425291 is about 450.4937641901.

The spelling of 91425291 in words is "ninety-one million, four hundred twenty-five thousand, two hundred ninety-one".