91913761 has 4 divisors (see below), whose sum is σ = 92065792. Its totient is φ = 91761732.

The previous prime is 91913753. The next prime is 91913797. The reversal of 91913761 is 16731919.

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: 16731919 = 1693 ⋅9883.

It is a cyclic number.

It is not a de Polignac number, because 91913761 - 2³ = 91913753 is a prime.

It is a super-2 number, since 2×91913761² = 16896278922330242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91913761.

It is not an unprimeable number, because it can be changed into a prime (91913161) 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, 75105 + ... + 76318.

It is an arithmetic number, because the mean of its divisors is an integer number (23016448).

Almost surely, 2^91913761 is an apocalyptic number.

It is an amenable number.

91913761 is a deficient number, since it is larger than the sum of its proper divisors (152031).

91913761 is a wasteful number, since it uses less digits than its factorization.

91913761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152030.

The product of its digits is 10206, while the sum is 37.

The square root of 91913761 is about 9587.1664739901. The cubic root of 91913761 is about 451.2946437723.

The spelling of 91913761 in words is "ninety-one million, nine hundred thirteen thousand, seven hundred sixty-one".