91669953 has 4 divisors (see below), whose sum is σ = 122226608. Its totient is φ = 61113300.

The previous prime is 91669943. The next prime is 91669961. The reversal of 91669953 is 35996619.

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.

It is not a de Polignac number, because 91669953 - 2¹² = 91665857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91669943) 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, 15278323 + ... + 15278328.

It is an arithmetic number, because the mean of its divisors is an integer number (30556652).

Almost surely, 2^91669953 is an apocalyptic number.

It is an amenable number.

91669953 is a deficient number, since it is larger than the sum of its proper divisors (30556655).

91669953 is a wasteful number, since it uses less digits than its factorization.

91669953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30556654.

The product of its digits is 393660, while the sum is 48.

The square root of 91669953 is about 9574.4426991862. The cubic root of 91669953 is about 450.8952597054.

The spelling of 91669953 in words is "ninety-one million, six hundred sixty-nine thousand, nine hundred fifty-three".