91932131 has 2 divisors, whose sum is σ = 91932132. Its totient is φ = 91932130.

The previous prime is 91932103. The next prime is 91932187. The reversal of 91932131 is 13123919.

It is a weak prime.

It is an emirp because it is prime and its reverse (13123919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91932131 - 2¹⁸ = 91669987 is a prime.

It is a super-2 number, since 2×91932131² = 16903033420402322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91932094 and 91932103.

It is not a weakly prime, because it can be changed into another prime (91932031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45966065 + 45966066.

It is an arithmetic number, because the mean of its divisors is an integer number (45966066).

Almost surely, 2^91932131 is an apocalyptic number.

91932131 is a deficient number, since it is larger than the sum of its proper divisors (1).

91932131 is an equidigital number, since it uses as much as digits as its factorization.

91932131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 29.

The square root of 91932131 is about 9588.1244777068. The cubic root of 91932131 is about 451.3247072081.

The spelling of 91932131 in words is "ninety-one million, nine hundred thirty-two thousand, one hundred thirty-one".