47078431 has 4 divisors (see below), whose sum is σ = 47104200. Its totient is φ = 47052664.

The previous prime is 47078417. The next prime is 47078441. The reversal of 47078431 is 13487074.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47078431 - 2²³ = 38689823 is a prime.

It is a super-2 number, since 2×47078431² = 4432757330843522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47078441) 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, 9916 + ... + 13873.

It is an arithmetic number, because the mean of its divisors is an integer number (11776050).

Almost surely, 2^47078431 is an apocalyptic number.

47078431 is a deficient number, since it is larger than the sum of its proper divisors (25769).

47078431 is a wasteful number, since it uses less digits than its factorization.

47078431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25768.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 47078431 is about 6861.3723845890. The cubic root of 47078431 is about 361.0832367667.

The spelling of 47078431 in words is "forty-seven million, seventy-eight thousand, four hundred thirty-one".