97721174906 has 4 divisors (see below), whose sum is σ = 146581762362. Its totient is φ = 48860587452.

The previous prime is 97721174897. The next prime is 97721174983. The reversal of 97721174906 is 60947112779.

It is a happy number.

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., 63701216881 + 34019958025 = 252391^2 + 184445^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24430293725 + ... + 24430293728.

Almost surely, 2^97721174906 is an apocalyptic number.

97721174906 is a deficient number, since it is larger than the sum of its proper divisors (48860587456).

97721174906 is a wasteful number, since it uses less digits than its factorization.

97721174906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48860587455.

The product of its (nonzero) digits is 1333584, while the sum is 53.

The spelling of 97721174906 in words is "ninety-seven billion, seven hundred twenty-one million, one hundred seventy-four thousand, nine hundred six".