47617991 has 8 divisors (see below), whose sum is σ = 48031104. Its totient is φ = 47207160.

The previous prime is 47617987. The next prime is 47617993. The reversal of 47617991 is 19971674.

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

It is a cyclic number.

It is not a de Polignac number, because 47617991 - 2² = 47617987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47617993) 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, 86780 + ... + 87326.

It is an arithmetic number, because the mean of its divisors is an integer number (6003888).

Almost surely, 2^47617991 is an apocalyptic number.

47617991 is a deficient number, since it is larger than the sum of its proper divisors (413113).

47617991 is a wasteful number, since it uses less digits than its factorization.

47617991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its digits is 95256, while the sum is 44.

The square root of 47617991 is about 6900.5790336754. The cubic root of 47617991 is about 362.4574434386.

The spelling of 47617991 in words is "forty-seven million, six hundred seventeen thousand, nine hundred ninety-one".