97915447 has 4 divisors (see below), whose sum is σ = 111903376. Its totient is φ = 83927520.

The previous prime is 97915409. The next prime is 97915459. The reversal of 97915447 is 74451979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74451979 = 7 ⋅10635997.

It is a cyclic number.

It is not a de Polignac number, because 97915447 - 2²³ = 89526839 is a prime.

It is a super-2 number, since 2×97915447² = 19174869522419618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97915397 and 97915406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97915487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6993954 + ... + 6993967.

It is an arithmetic number, because the mean of its divisors is an integer number (27975844).

Almost surely, 2^97915447 is an apocalyptic number.

97915447 is a deficient number, since it is larger than the sum of its proper divisors (13987929).

97915447 is a wasteful number, since it uses less digits than its factorization.

97915447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13987928.

The product of its digits is 317520, while the sum is 46.

The square root of 97915447 is about 9895.2234436621. The cubic root of 97915447 is about 460.9109971019.

The spelling of 97915447 in words is "ninety-seven million, nine hundred fifteen thousand, four hundred forty-seven".