78947937 has 24 divisors (see below), whose sum is σ = 120120000. Its totient is φ = 49867488.

The previous prime is 78947933. The next prime is 78947941. The reversal of 78947937 is 73974987.

It is an interprime number because it is at equal distance from previous prime (78947933) and next prime (78947941).

It is not a de Polignac number, because 78947937 - 2² = 78947933 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78947933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20814 + ... + 24312.

It is an arithmetic number, because the mean of its divisors is an integer number (5005000).

Almost surely, 2^78947937 is an apocalyptic number.

It is an amenable number.

78947937 is a deficient number, since it is larger than the sum of its proper divisors (41172063).

78947937 is a wasteful number, since it uses less digits than its factorization.

78947937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3637 (or 3634 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 78947937 is about 8885.2651620534. The cubic root of 78947937 is about 428.9897629063.

The spelling of 78947937 in words is "seventy-eight million, nine hundred forty-seven thousand, nine hundred thirty-seven".