91100431 has 2 divisors, whose sum is σ = 91100432. Its totient is φ = 91100430.

The previous prime is 91100419. The next prime is 91100491. The reversal of 91100431 is 13400119.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91100431 - 2¹¹ = 91098383 is a prime.

It is a super-2 number, since 2×91100431² = 16598577056771522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91100399 and 91100408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91100491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45550215 + 45550216.

It is an arithmetic number, because the mean of its divisors is an integer number (45550216).

Almost surely, 2^91100431 is an apocalyptic number.

91100431 is a deficient number, since it is larger than the sum of its proper divisors (1).

91100431 is an equidigital number, since it uses as much as digits as its factorization.

91100431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 91100431 is about 9544.6545773014. The cubic root of 91100431 is about 449.9595535664.

The spelling of 91100431 in words is "ninety-one million, one hundred thousand, four hundred thirty-one".