91030052 has 6 divisors (see below), whose sum is σ = 159302598. Its totient is φ = 45515024.

The previous prime is 91029989. The next prime is 91030057. The reversal of 91030052 is 25003019.

It can be written as a sum of positive squares in only one way, i.e., 54257956 + 36772096 = 7366^2 + 6064^2 .

It is not an unprimeable number, because it can be changed into a prime (91030057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11378753 + ... + 11378760.

It is an arithmetic number, because the mean of its divisors is an integer number (26550433).

Almost surely, 2^91030052 is an apocalyptic number.

It is an amenable number.

91030052 is a deficient number, since it is larger than the sum of its proper divisors (68272546).

91030052 is a wasteful number, since it uses less digits than its factorization.

91030052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22757517 (or 22757515 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 91030052 is about 9540.9670369413. The cubic root of 91030052 is about 449.8436526811.

The spelling of 91030052 in words is "ninety-one million, thirty thousand, fifty-two".