47581939 has 2 divisors, whose sum is σ = 47581940. Its totient is φ = 47581938.

The previous prime is 47581903. The next prime is 47581957. The reversal of 47581939 is 93918574.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47581939 - 2⁷ = 47581811 is a prime.

It is not a weakly prime, because it can be changed into another prime (47581979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23790969 + 23790970.

It is an arithmetic number, because the mean of its divisors is an integer number (23790970).

Almost surely, 2^47581939 is an apocalyptic number.

47581939 is a deficient number, since it is larger than the sum of its proper divisors (1).

47581939 is an equidigital number, since it uses as much as digits as its factorization.

47581939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 47581939 is about 6897.9662944958. The cubic root of 47581939 is about 362.3659471038.

The spelling of 47581939 in words is "forty-seven million, five hundred eighty-one thousand, nine hundred thirty-nine".