47725791 has 8 divisors (see below), whose sum is σ = 63920640. Its totient is φ = 31674072.

The previous prime is 47725787. The next prime is 47725807. The reversal of 47725791 is 19752774.

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

It is not a de Polignac number, because 47725791 - 2² = 47725787 is a prime.

It is a super-2 number, since 2×47725791² = 4555502253151362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47725751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35001 + ... + 36338.

It is an arithmetic number, because the mean of its divisors is an integer number (7990080).

Almost surely, 2^47725791 is an apocalyptic number.

47725791 is a deficient number, since it is larger than the sum of its proper divisors (16194849).

47725791 is a wasteful number, since it uses less digits than its factorization.

47725791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71565.

The product of its digits is 123480, while the sum is 42.

The square root of 47725791 is about 6908.3855566985. The cubic root of 47725791 is about 362.7307537535.

It can be divided in two parts, 47725 and 791, that added together give a triangular number (48516 = T₃₁₁).

The spelling of 47725791 in words is "forty-seven million, seven hundred twenty-five thousand, seven hundred ninety-one".