91945401 has 16 divisors (see below), whose sum is σ = 130045824. Its totient is φ = 57584384.

The previous prime is 91945397. The next prime is 91945409. The reversal of 91945401 is 10454919.

It is a cyclic number.

It is not a de Polignac number, because 91945401 - 2² = 91945397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91945409) 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, 33196 + ... + 35858.

It is an arithmetic number, because the mean of its divisors is an integer number (8127864).

Almost surely, 2^91945401 is an apocalyptic number.

91945401 is the 6065-th centered pentagonal number.

It is an amenable number.

91945401 is a deficient number, since it is larger than the sum of its proper divisors (38100423).

91945401 is a wasteful number, since it uses less digits than its factorization.

91945401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 91945401 is about 9588.8164545996. The cubic root of 91945401 is about 451.3464217442.

The spelling of 91945401 in words is "ninety-one million, nine hundred forty-five thousand, four hundred one".