91742408 has 8 divisors (see below), whose sum is σ = 172017030. Its totient is φ = 45871200.

The previous prime is 91742401. The next prime is 91742447. The reversal of 91742408 is 80424719.

It can be written as a sum of positive squares in only one way, i.e., 89832484 + 1909924 = 9478^2 + 1382^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (91742401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5733893 + ... + 5733908.

Almost surely, 2^91742408 is an apocalyptic number.

It is an amenable number.

91742408 is a deficient number, since it is larger than the sum of its proper divisors (80274622).

91742408 is a wasteful number, since it uses less digits than its factorization.

91742408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11467807 (or 11467803 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 91742408 is about 9578.2257229614. The cubic root of 91742408 is about 451.0140227661.

The spelling of 91742408 in words is "ninety-one million, seven hundred forty-two thousand, four hundred eight".