49981979 has 2 divisors, whose sum is σ = 49981980. Its totient is φ = 49981978.

The previous prime is 49981973. The next prime is 49981999. The reversal of 49981979 is 97918994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49981979 - 2⁴ = 49981963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49981973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24990989 + 24990990.

It is an arithmetic number, because the mean of its divisors is an integer number (24990990).

Almost surely, 2^49981979 is an apocalyptic number.

49981979 is a deficient number, since it is larger than the sum of its proper divisors (1).

49981979 is an equidigital number, since it uses as much as digits as its factorization.

49981979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 56.

The square root of 49981979 is about 7069.7934198957. The cubic root of 49981979 is about 368.3588845912.

The spelling of 49981979 in words is "forty-nine million, nine hundred eighty-one thousand, nine hundred seventy-nine".