97650978 has 16 divisors (see below), whose sum is σ = 197497440. Its totient is φ = 32184416.

The previous prime is 97650977. The next prime is 97650991. The reversal of 97650978 is 87905679.

It is a self number, because there is not a number n which added to its sum of digits gives 97650978.

It is not an unprimeable number, because it can be changed into a prime (97650977) 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, 90900 + ... + 91967.

It is an arithmetic number, because the mean of its divisors is an integer number (12343590).

Almost surely, 2^97650978 is an apocalyptic number.

97650978 is an abundant number, since it is smaller than the sum of its proper divisors (99846462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97650978 is a wasteful number, since it uses less digits than its factorization.

97650978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182961.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 97650978 is about 9881.8509399808. The cubic root of 97650978 is about 460.4956503696.

The spelling of 97650978 in words is "ninety-seven million, six hundred fifty thousand, nine hundred seventy-eight".