47979797 has 8 divisors (see below), whose sum is σ = 51141312. Its totient is φ = 44856000.

The previous prime is 47979791. The next prime is 47979821. The reversal of 47979797 is 79797974.

47979797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 47979797 - 2¹⁰ = 47978773 is a prime.

It is a super-2 number, since 2×47979797² = 4604121840322418, which contains 22 as substring.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6779 + ... + 11912.

It is an arithmetic number, because the mean of its divisors is an integer number (6392664).

Almost surely, 2^47979797 is an apocalyptic number.

It is an amenable number.

47979797 is a deficient number, since it is larger than the sum of its proper divisors (3161515).

47979797 is a wasteful number, since it uses less digits than its factorization.

47979797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18859.

The product of its digits is 7001316, while the sum is 59.

The square root of 47979797 is about 6926.7450508879. The cubic root of 47979797 is about 363.3731235121.

The spelling of 47979797 in words is "forty-seven million, nine hundred seventy-nine thousand, seven hundred ninety-seven".