91039490 has 8 divisors (see below), whose sum is σ = 163871100. Its totient is φ = 36415792.

The previous prime is 91039477. The next prime is 91039519. The reversal of 91039490 is 9493019.

It can be written as a sum of positive squares in 2 ways, for example, as 77563249 + 13476241 = 8807^2 + 3671^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 91039490.

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, 4551965 + ... + 4551984.

Almost surely, 2^91039490 is an apocalyptic number.

91039490 is a deficient number, since it is larger than the sum of its proper divisors (72831610).

91039490 is a wasteful number, since it uses less digits than its factorization.

91039490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9103956.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 91039490 is about 9541.4616280736. The cubic root of 91039490 is about 449.8591987474.

The spelling of 91039490 in words is "ninety-one million, thirty-nine thousand, four hundred ninety".