91279402 has 4 divisors (see below), whose sum is σ = 136919106. Its totient is φ = 45639700.

The previous prime is 91279373. The next prime is 91279403. The reversal of 91279402 is 20497219.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 89889361 + 1390041 = 9481^2 + 1179^2 .

It is not an unprimeable number, because it can be changed into a prime (91279403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22819849 + ... + 22819852.

Almost surely, 2^91279402 is an apocalyptic number.

91279402 is a deficient number, since it is larger than the sum of its proper divisors (45639704).

91279402 is a wasteful number, since it uses less digits than its factorization.

91279402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45639703.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 91279402 is about 9554.0254343392. The cubic root of 91279402 is about 450.2540162566.

The spelling of 91279402 in words is "ninety-one million, two hundred seventy-nine thousand, four hundred two".