47880391 has 4 divisors (see below), whose sum is σ = 51563512. Its totient is φ = 44197272.

The previous prime is 47880389. The next prime is 47880409. The reversal of 47880391 is 19308874.

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 47880391 - 2¹ = 47880389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47880311) 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, 1841541 + ... + 1841566.

It is an arithmetic number, because the mean of its divisors is an integer number (12890878).

Almost surely, 2^47880391 is an apocalyptic number.

47880391 is a deficient number, since it is larger than the sum of its proper divisors (3683121).

47880391 is a wasteful number, since it uses less digits than its factorization.

47880391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683120.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 47880391 is about 6919.5658100780. The cubic root of 47880391 is about 363.1220008482.

The spelling of 47880391 in words is "forty-seven million, eight hundred eighty thousand, three hundred ninety-one".