47661239 has 4 divisors (see below), whose sum is σ = 49304760. Its totient is φ = 46017720.

The previous prime is 47661169. The next prime is 47661259. The reversal of 47661239 is 93216674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93216674 = 2 ⋅46608337.

It is a cyclic number.

It is not a de Polignac number, because 47661239 - 2²⁰ = 46612663 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 (47661259) 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, 821717 + ... + 821774.

It is an arithmetic number, because the mean of its divisors is an integer number (12326190).

Almost surely, 2^47661239 is an apocalyptic number.

47661239 is a deficient number, since it is larger than the sum of its proper divisors (1643521).

47661239 is a wasteful number, since it uses less digits than its factorization.

47661239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643520.

The product of its digits is 54432, while the sum is 38.

The square root of 47661239 is about 6903.7119725551. The cubic root of 47661239 is about 362.5671415864.

The spelling of 47661239 in words is "forty-seven million, six hundred sixty-one thousand, two hundred thirty-nine".