47499979 has 2 divisors, whose sum is σ = 47499980. Its totient is φ = 47499978.

The previous prime is 47499953. The next prime is 47500001. The reversal of 47499979 is 97999474.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47499979 - 2⁹ = 47499467 is a prime.

It is not a weakly prime, because it can be changed into another prime (47499929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23749989 + 23749990.

It is an arithmetic number, because the mean of its divisors is an integer number (23749990).

Almost surely, 2^47499979 is an apocalyptic number.

47499979 is a deficient number, since it is larger than the sum of its proper divisors (1).

47499979 is an equidigital number, since it uses as much as digits as its factorization.

47499979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 58.

The square root of 47499979 is about 6892.0228525448. The cubic root of 47499979 is about 362.1577688015.

The spelling of 47499979 in words is "forty-seven million, four hundred ninety-nine thousand, nine hundred seventy-nine".