97921970 has 16 divisors (see below), whose sum is σ = 176636160. Its totient is φ = 39085104.

The previous prime is 97921969. The next prime is 97921973. The reversal of 97921970 is 7912979.

It is not an unprimeable number, because it can be changed into a prime (97921973) 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, 5432 + ... + 15011.

It is an arithmetic number, because the mean of its divisors is an integer number (11039760).

Almost surely, 2^97921970 is an apocalyptic number.

97921970 is a deficient number, since it is larger than the sum of its proper divisors (78714190).

97921970 is a wasteful number, since it uses less digits than its factorization.

97921970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20929.

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 97921970 is about 9895.5530416445. The cubic root of 97921970 is about 460.9212319721.

The spelling of 97921970 in words is "ninety-seven million, nine hundred twenty-one thousand, nine hundred seventy".