91490870 has 8 divisors (see below), whose sum is σ = 164683584. Its totient is φ = 36596344.

The previous prime is 91490869. The next prime is 91490881. The reversal of 91490870 is 7809419.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4574534 + ... + 4574553.

It is an arithmetic number, because the mean of its divisors is an integer number (20585448).

Almost surely, 2^91490870 is an apocalyptic number.

91490870 is a deficient number, since it is larger than the sum of its proper divisors (73192714).

91490870 is a wasteful number, since it uses less digits than its factorization.

91490870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9149094.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 91490870 is about 9565.0859902042. The cubic root of 91490870 is about 450.6014509121.

The spelling of 91490870 in words is "ninety-one million, four hundred ninety thousand, eight hundred seventy".