91504901 has 4 divisors (see below), whose sum is σ = 94456704. Its totient is φ = 88553100.

The previous prime is 91504883. The next prime is 91504909. The reversal of 91504901 is 10940519.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10940519 = 47 ⋅232777.

It is a cyclic number.

It is not a de Polignac number, because 91504901 - 2⁶ = 91504837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91504909) 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, 1475855 + ... + 1475916.

It is an arithmetic number, because the mean of its divisors is an integer number (23614176).

Almost surely, 2^91504901 is an apocalyptic number.

It is an amenable number.

91504901 is a deficient number, since it is larger than the sum of its proper divisors (2951803).

91504901 is a wasteful number, since it uses less digits than its factorization.

91504901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951802.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 91504901 is about 9565.8194107980. The cubic root of 91504901 is about 450.6244844155.

The spelling of 91504901 in words is "ninety-one million, five hundred four thousand, nine hundred one".