91197402 has 16 divisors (see below), whose sum is σ = 188684640. Its totient is φ = 29350832.

The previous prime is 91197391. The next prime is 91197409. The reversal of 91197402 is 20479119.

It is a super-2 number, since 2×91197402² = 16633932263099208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (91197409) 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, 261888 + ... + 262235.

It is an arithmetic number, because the mean of its divisors is an integer number (11792790).

Almost surely, 2^91197402 is an apocalyptic number.

91197402 is an abundant number, since it is smaller than the sum of its proper divisors (97487238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91197402 is a wasteful number, since it uses less digits than its factorization.

91197402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524157.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 91197402 is about 9549.7330852752. The cubic root of 91197402 is about 450.1191486965.

The spelling of 91197402 in words is "ninety-one million, one hundred ninety-seven thousand, four hundred two".