47979799 has 8 divisors (see below), whose sum is σ = 56171808. Its totient is φ = 40122240.

The previous prime is 47979791. The next prime is 47979821. The reversal of 47979799 is 99797974.

It is a happy number.

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 47979799 - 2³ = 47979791 is a prime.

It is a super-2 number, since 2×47979799² = 4604122224160802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47979791) 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, 83302 + ... + 83875.

It is an arithmetic number, because the mean of its divisors is an integer number (7021476).

Almost surely, 2^47979799 is an apocalyptic number.

47979799 is a deficient number, since it is larger than the sum of its proper divisors (8192009).

47979799 is a wasteful number, since it uses less digits than its factorization.

47979799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167225.

The product of its digits is 9001692, while the sum is 61.

The square root of 47979799 is about 6926.7451952558. The cubic root of 47979799 is about 363.3731285611.

The spelling of 47979799 in words is "forty-seven million, nine hundred seventy-nine thousand, seven hundred ninety-nine".