47979551 has 2 divisors, whose sum is σ = 47979552. Its totient is φ = 47979550.

The previous prime is 47979521. The next prime is 47979641. The reversal of 47979551 is 15597974.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47979551 - 2⁶ = 47979487 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47979496 and 47979505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47979521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23989775 + 23989776.

It is an arithmetic number, because the mean of its divisors is an integer number (23989776).

Almost surely, 2^47979551 is an apocalyptic number.

47979551 is a deficient number, since it is larger than the sum of its proper divisors (1).

47979551 is an equidigital number, since it uses as much as digits as its factorization.

47979551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 47.

The square root of 47979551 is about 6926.7272936070. The cubic root of 47979551 is about 363.3725024873.

The spelling of 47979551 in words is "forty-seven million, nine hundred seventy-nine thousand, five hundred fifty-one".