47131978 has 8 divisors (see below), whose sum is σ = 71172900. Its totient is φ = 23407680.

The previous prime is 47131963. The next prime is 47131993. The reversal of 47131978 is 87913174.

It is an interprime number because it is at equal distance from previous prime (47131963) and next prime (47131993).

It can be written as a sum of positive squares in 2 ways, for example, as 43917129 + 3214849 = 6627^2 + 1793^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 47131978.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78783 + ... + 79378.

Almost surely, 2^47131978 is an apocalyptic number.

47131978 is a deficient number, since it is larger than the sum of its proper divisors (24040922).

47131978 is a wasteful number, since it uses less digits than its factorization.

47131978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158312.

The product of its digits is 42336, while the sum is 40.

The square root of 47131978 is about 6865.2733376028. The cubic root of 47131978 is about 361.2200835688.

The spelling of 47131978 in words is "forty-seven million, one hundred thirty-one thousand, nine hundred seventy-eight".