91351490 has 8 divisors (see below), whose sum is σ = 164432700. Its totient is φ = 36540592.

The previous prime is 91351457. The next prime is 91351493. The reversal of 91351490 is 9415319.

It can be written as a sum of positive squares in 2 ways, for example, as 80586529 + 10764961 = 8977^2 + 3281^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91351493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4567565 + ... + 4567584.

Almost surely, 2^91351490 is an apocalyptic number.

91351490 is a deficient number, since it is larger than the sum of its proper divisors (73081210).

91351490 is a wasteful number, since it uses less digits than its factorization.

91351490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9135156.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 91351490 is about 9557.7973403918. The cubic root of 91351490 is about 450.3725145888.

The spelling of 91351490 in words is "ninety-one million, three hundred fifty-one thousand, four hundred ninety".