97212978 has 12 divisors (see below), whose sum is σ = 210628158. Its totient is φ = 32404320.

The previous prime is 97212961. The next prime is 97212979. The reversal of 97212978 is 87921279.

It can be written as a sum of positive squares in only one way, i.e., 96884649 + 328329 = 9843^2 + 573^2 .

It is not an unprimeable number, because it can be changed into a prime (97212979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2700343 + ... + 2700378.

Almost surely, 2^97212978 is an apocalyptic number.

97212978 is an abundant number, since it is smaller than the sum of its proper divisors (113415180).

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

97212978 is a wasteful number, since it uses less digits than its factorization.

97212978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400729 (or 5400726 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 97212978 is about 9859.6641930646. The cubic root of 97212978 is about 459.8061218255.

The spelling of 97212978 in words is "ninety-seven million, two hundred twelve thousand, nine hundred seventy-eight".