91297607 has 2 divisors, whose sum is σ = 91297608. Its totient is φ = 91297606.

The previous prime is 91297601. The next prime is 91297621. The reversal of 91297607 is 70679219.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91297607 - 2⁶ = 91297543 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 (91297601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45648803 + 45648804.

It is an arithmetic number, because the mean of its divisors is an integer number (45648804).

Almost surely, 2^91297607 is an apocalyptic number.

91297607 is a deficient number, since it is larger than the sum of its proper divisors (1).

91297607 is an equidigital number, since it uses as much as digits as its factorization.

91297607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 91297607 is about 9554.9781266102. The cubic root of 91297607 is about 450.2839475419.

The spelling of 91297607 in words is "ninety-one million, two hundred ninety-seven thousand, six hundred seven".