47402891 has 4 divisors (see below), whose sum is σ = 49897800. Its totient is φ = 44907984.

The previous prime is 47402881. The next prime is 47402893. The reversal of 47402891 is 19820474.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47402891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47402893) 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, 1247426 + ... + 1247463.

It is an arithmetic number, because the mean of its divisors is an integer number (12474450).

Almost surely, 2^47402891 is an apocalyptic number.

47402891 is a deficient number, since it is larger than the sum of its proper divisors (2494909).

47402891 is a wasteful number, since it uses less digits than its factorization.

47402891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494908.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 47402891 is about 6884.9757443291. The cubic root of 47402891 is about 361.9108553120.

The spelling of 47402891 in words is "forty-seven million, four hundred two thousand, eight hundred ninety-one".