47979965 has 16 divisors (see below), whose sum is σ = 63313920. Its totient is φ = 34614720.

The previous prime is 47979961. The next prime is 47980019. The reversal of 47979965 is 56997974.

It is not a de Polignac number, because 47979965 - 2² = 47979961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47979965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47979961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3551 + ... + 10419.

It is an arithmetic number, because the mean of its divisors is an integer number (3957120).

Almost surely, 2^47979965 is an apocalyptic number.

It is an amenable number.

47979965 is a deficient number, since it is larger than the sum of its proper divisors (15333955).

47979965 is a wasteful number, since it uses less digits than its factorization.

47979965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7012.

The product of its digits is 4286520, while the sum is 56.

The square root of 47979965 is about 6926.7571777853. The cubic root of 47979965 is about 363.3735476255.

Subtracting 47979965 from its reverse (56997974), we obtain a square (9018009 = 3003²).

The spelling of 47979965 in words is "forty-seven million, nine hundred seventy-nine thousand, nine hundred sixty-five".