91947404 has 12 divisors (see below), whose sum is σ = 161535864. Its totient is φ = 45794304.

The previous prime is 91947397. The next prime is 91947409. The reversal of 91947404 is 40474919.

It is not an unprimeable number, because it can be changed into a prime (91947409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43694 + ... + 45749.

It is an arithmetic number, because the mean of its divisors is an integer number (13461322).

Almost surely, 2^91947404 is an apocalyptic number.

It is an amenable number.

91947404 is a deficient number, since it is larger than the sum of its proper divisors (69588460).

91947404 is a wasteful number, since it uses less digits than its factorization.

91947404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89704 (or 89702 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 91947404 is about 9588.9208986204. The cubic root of 91947404 is about 451.3496991976.

The spelling of 91947404 in words is "ninety-one million, nine hundred forty-seven thousand, four hundred four".