47979521 has 2 divisors, whose sum is σ = 47979522. Its totient is φ = 47979520.

The previous prime is 47979517. The next prime is 47979551. The reversal of 47979521 is 12597974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36663025 + 11316496 = 6055^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 47979521 - 2² = 47979517 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47979551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23989760 + 23989761.

It is an arithmetic number, because the mean of its divisors is an integer number (23989761).

Almost surely, 2^47979521 is an apocalyptic number.

It is an amenable number.

47979521 is a deficient number, since it is larger than the sum of its proper divisors (1).

47979521 is an equidigital number, since it uses as much as digits as its factorization.

47979521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The square root of 47979521 is about 6926.7251280818. The cubic root of 47979521 is about 363.3724267524.

The spelling of 47979521 in words is "forty-seven million, nine hundred seventy-nine thousand, five hundred twenty-one".