78972481 has 8 divisors (see below), whose sum is σ = 93366720. Its totient is φ = 65356368.

The previous prime is 78972451. The next prime is 78972559. The reversal of 78972481 is 18427987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78972481 - 2⁵ = 78972449 is a prime.

It is a super-2 number, since 2×78972481² = 12473305510590722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78972451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194311 + ... + 194716.

It is an arithmetic number, because the mean of its divisors is an integer number (11670840).

Almost surely, 2^78972481 is an apocalyptic number.

It is an amenable number.

78972481 is a deficient number, since it is larger than the sum of its proper divisors (14394239).

78972481 is a wasteful number, since it uses less digits than its factorization.

78972481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389063.

The product of its digits is 225792, while the sum is 46.

The square root of 78972481 is about 8886.6462177809. The cubic root of 78972481 is about 429.0342142845.

The spelling of 78972481 in words is "seventy-eight million, nine hundred seventy-two thousand, four hundred eighty-one".