97997906 has 4 divisors (see below), whose sum is σ = 146996862. Its totient is φ = 48998952.

The previous prime is 97997897. The next prime is 97997923. The reversal of 97997906 is 60979979.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 53655625 + 44342281 = 7325^2 + 6659^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24499475 + ... + 24499478.

Almost surely, 2^97997906 is an apocalyptic number.

97997906 is a deficient number, since it is larger than the sum of its proper divisors (48998956).

97997906 is a wasteful number, since it uses less digits than its factorization.

97997906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48998955.

The product of its (nonzero) digits is 1928934, while the sum is 56.

The square root of 97997906 is about 9899.3891730753. The cubic root of 97997906 is about 461.0403454227.

The spelling of 97997906 in words is "ninety-seven million, nine hundred ninety-seven thousand, nine hundred six".