97709642 has 32 divisors (see below), whose sum is σ = 164520720. Its totient is φ = 43294720.

The previous prime is 97709641. The next prime is 97709657. The reversal of 97709642 is 24690779.

It can be written as a sum of positive squares in 8 ways, for example, as 66896041 + 30813601 = 8179^2 + 5551^2 .

It is a junction number, because it is equal to n+sod(n) for n = 97709593 and 97709602.

It is not an unprimeable number, because it can be changed into a prime (97709641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39218 + ... + 41634.

Almost surely, 2^97709642 is an apocalyptic number.

97709642 is a deficient number, since it is larger than the sum of its proper divisors (66811078).

97709642 is a wasteful number, since it uses less digits than its factorization.

97709642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 97709642 is about 9884.8187641453. The cubic root of 97709642 is about 460.5878464388.

The spelling of 97709642 in words is "ninety-seven million, seven hundred nine thousand, six hundred forty-two".