97779079 has 4 divisors (see below), whose sum is σ = 98142840. Its totient is φ = 97415320.

The previous prime is 97779067. The next prime is 97779083. The reversal of 97779079 is 97097779.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97779079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97779029) 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, 181477 + ... + 182014.

It is an arithmetic number, because the mean of its divisors is an integer number (24535710).

Almost surely, 2^97779079 is an apocalyptic number.

97779079 is a deficient number, since it is larger than the sum of its proper divisors (363761).

97779079 is a wasteful number, since it uses less digits than its factorization.

97779079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363760.

The product of its (nonzero) digits is 1750329, while the sum is 55.

The square root of 97779079 is about 9888.3304455302. The cubic root of 97779079 is about 460.6969256272.

The spelling of 97779079 in words is "ninety-seven million, seven hundred seventy-nine thousand, seventy-nine".