91361397 has 16 divisors (see below), whose sum is σ = 126584640. Its totient is φ = 58541952.

The previous prime is 91361381. The next prime is 91361419. The reversal of 91361397 is 79316319.

It is not a de Polignac number, because 91361397 - 2⁴ = 91361381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91361357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18018 + ... + 22524.

It is an arithmetic number, because the mean of its divisors is an integer number (7911540).

Almost surely, 2^91361397 is an apocalyptic number.

It is an amenable number.

91361397 is a deficient number, since it is larger than the sum of its proper divisors (35223243).

91361397 is a wasteful number, since it uses less digits than its factorization.

91361397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772.

The product of its digits is 30618, while the sum is 39.

The square root of 91361397 is about 9558.3155942875. The cubic root of 91361397 is about 450.3887948531.

The spelling of 91361397 in words is "ninety-one million, three hundred sixty-one thousand, three hundred ninety-seven".