91653131 has 4 divisors (see below), whose sum is σ = 96477000. Its totient is φ = 86829264.

The previous prime is 91653127. The next prime is 91653173. The reversal of 91653131 is 13135619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13135619 = 7 ⋅1876517.

It is a cyclic number.

It is not a de Polignac number, because 91653131 - 2² = 91653127 is a prime.

It is a super-2 number, since 2×91653131² = 16800592844206322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91653094 and 91653103.

It is not an unprimeable number, because it can be changed into a prime (91653031) 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, 2411906 + ... + 2411943.

It is an arithmetic number, because the mean of its divisors is an integer number (24119250).

Almost surely, 2^91653131 is an apocalyptic number.

91653131 is a deficient number, since it is larger than the sum of its proper divisors (4823869).

91653131 is a wasteful number, since it uses less digits than its factorization.

91653131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823868.

The product of its digits is 2430, while the sum is 29.

The square root of 91653131 is about 9573.5641743292. The cubic root of 91653131 is about 450.8676773340.

The spelling of 91653131 in words is "ninety-one million, six hundred fifty-three thousand, one hundred thirty-one".