91601039 has 2 divisors, whose sum is σ = 91601040. Its totient is φ = 91601038.

The previous prime is 91600997. The next prime is 91601047. The reversal of 91601039 is 93010619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91601039 - 2¹² = 91596943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91601239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45800519 + 45800520.

It is an arithmetic number, because the mean of its divisors is an integer number (45800520).

Almost surely, 2^91601039 is an apocalyptic number.

91601039 is a deficient number, since it is larger than the sum of its proper divisors (1).

91601039 is an equidigital number, since it uses as much as digits as its factorization.

91601039 is an evil number, because the sum of its binary digits is even.

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

The square root of 91601039 is about 9570.8431707974. The cubic root of 91601039 is about 450.7822427183.

The spelling of 91601039 in words is "ninety-one million, six hundred one thousand, thirty-nine".