97447138 has 4 divisors (see below), whose sum is σ = 146170710. Its totient is φ = 48723568.

The previous prime is 97447099. The next prime is 97447139. The reversal of 97447138 is 83174479.

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., 69006249 + 28440889 = 8307^2 + 5333^2 .

It is a junction number, because it is equal to n+sod(n) for n = 97447094 and 97447103.

It is not an unprimeable number, because it can be changed into a prime (97447139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24361783 + ... + 24361786.

Almost surely, 2^97447138 is an apocalyptic number.

97447138 is a deficient number, since it is larger than the sum of its proper divisors (48723572).

97447138 is a wasteful number, since it uses less digits than its factorization.

97447138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48723571.

The product of its digits is 169344, while the sum is 43.

The square root of 97447138 is about 9871.5316947270. The cubic root of 97447138 is about 460.1750090230.

The spelling of 97447138 in words is "ninety-seven million, four hundred forty-seven thousand, one hundred thirty-eight".