91408930 has 8 divisors (see below), whose sum is σ = 164536092. Its totient is φ = 36563568.

The previous prime is 91408913. The next prime is 91408931. The reversal of 91408930 is 3980419.

It can be written as a sum of positive squares in 2 ways, for example, as 85692049 + 5716881 = 9257^2 + 2391^2 .

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

It is not an unprimeable number, because it can be changed into a prime (91408931) 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, 4570437 + ... + 4570456.

Almost surely, 2^91408930 is an apocalyptic number.

91408930 is a deficient number, since it is larger than the sum of its proper divisors (73127162).

91408930 is a wasteful number, since it uses less digits than its factorization.

91408930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140900.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 91408930 is about 9560.8017446237. The cubic root of 91408930 is about 450.4668899043.

The spelling of 91408930 in words is "ninety-one million, four hundred eight thousand, nine hundred thirty".