97790805 has 24 divisors (see below), whose sum is σ = 193719552. Its totient is φ = 44704224.

The previous prime is 97790773. The next prime is 97790821. The reversal of 97790805 is 50809779.

It is not a de Polignac number, because 97790805 - 2⁵ = 97790773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154909 + ... + 155538.

It is an arithmetic number, because the mean of its divisors is an integer number (8071648).

Almost surely, 2^97790805 is an apocalyptic number.

It is an amenable number.

97790805 is a deficient number, since it is larger than the sum of its proper divisors (95928747).

97790805 is a wasteful number, since it uses less digits than its factorization.

97790805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310465 (or 310462 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 97790805 is about 9888.9233488788. The cubic root of 97790805 is about 460.7153410056.

The spelling of 97790805 in words is "ninety-seven million, seven hundred ninety thousand, eight hundred five".