47940091 has 2 divisors, whose sum is σ = 47940092. Its totient is φ = 47940090.

The previous prime is 47940077. The next prime is 47940133. The reversal of 47940091 is 19004974.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47940091 - 2⁷ = 47939963 is a prime.

It is not a weakly prime, because it can be changed into another prime (47940791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23970045 + 23970046.

It is an arithmetic number, because the mean of its divisors is an integer number (23970046).

Almost surely, 2^47940091 is an apocalyptic number.

47940091 is a deficient number, since it is larger than the sum of its proper divisors (1).

47940091 is an equidigital number, since it uses as much as digits as its factorization.

47940091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 47940091 is about 6923.8783207101. The cubic root of 47940091 is about 363.2728585673.

The spelling of 47940091 in words is "forty-seven million, nine hundred forty thousand, ninety-one".