91119551 has 2 divisors, whose sum is σ = 91119552. Its totient is φ = 91119550.

The previous prime is 91119547. The next prime is 91119557. The reversal of 91119551 is 15591119.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91119551 - 2² = 91119547 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91119557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45559775 + 45559776.

It is an arithmetic number, because the mean of its divisors is an integer number (45559776).

Almost surely, 2^91119551 is an apocalyptic number.

91119551 is a deficient number, since it is larger than the sum of its proper divisors (1).

91119551 is an equidigital number, since it uses as much as digits as its factorization.

91119551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2025, while the sum is 32.

The square root of 91119551 is about 9545.6561325034. The cubic root of 91119551 is about 449.9910302739.

The spelling of 91119551 in words is "ninety-one million, one hundred nineteen thousand, five hundred fifty-one".