49399979 has 2 divisors, whose sum is σ = 49399980. Its totient is φ = 49399978.

The previous prime is 49399951. The next prime is 49400003. The reversal of 49399979 is 97999394.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49399979 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49399949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24699989 + 24699990.

It is an arithmetic number, because the mean of its divisors is an integer number (24699990).

Almost surely, 2^49399979 is an apocalyptic number.

49399979 is a deficient number, since it is larger than the sum of its proper divisors (1).

49399979 is an equidigital number, since it uses as much as digits as its factorization.

49399979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4960116, while the sum is 59.

The square root of 49399979 is about 7028.5118624073. The cubic root of 49399979 is about 366.9235512075.

The spelling of 49399979 in words is "forty-nine million, three hundred ninety-nine thousand, nine hundred seventy-nine".