91604149397 has 8 divisors (see below), whose sum is σ = 92024050944. Its totient is φ = 91184329728.

The previous prime is 91604149367. The next prime is 91604149411. The reversal of 91604149397 is 79394140619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91604149397 - 2²² = 91599955093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91604149367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4101653 + ... + 4123925.

It is an arithmetic number, because the mean of its divisors is an integer number (11503006368).

Almost surely, 2^91604149397 is an apocalyptic number.

It is an amenable number.

91604149397 is a deficient number, since it is larger than the sum of its proper divisors (419901547).

91604149397 is a wasteful number, since it uses less digits than its factorization.

91604149397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40939.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The spelling of 91604149397 in words is "ninety-one billion, six hundred four million, one hundred forty-nine thousand, three hundred ninety-seven".