47399491 has 2 divisors, whose sum is σ = 47399492. Its totient is φ = 47399490.

The previous prime is 47399483. The next prime is 47399497. The reversal of 47399491 is 19499374.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47399491 - 2³ = 47399483 is a prime.

It is not a weakly prime, because it can be changed into another prime (47399497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23699745 + 23699746.

It is an arithmetic number, because the mean of its divisors is an integer number (23699746).

Almost surely, 2^47399491 is an apocalyptic number.

47399491 is a deficient number, since it is larger than the sum of its proper divisors (1).

47399491 is an equidigital number, since it uses as much as digits as its factorization.

47399491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 47399491 is about 6884.7288254513. The cubic root of 47399491 is about 361.9022023494.

The spelling of 47399491 in words is "forty-seven million, three hundred ninety-nine thousand, four hundred ninety-one".