49129879 has 2 divisors, whose sum is σ = 49129880. Its totient is φ = 49129878.

The previous prime is 49129841. The next prime is 49129901. The reversal of 49129879 is 97892194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49129879 - 2²³ = 40741271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49129979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24564939 + 24564940.

It is an arithmetic number, because the mean of its divisors is an integer number (24564940).

Almost surely, 2^49129879 is an apocalyptic number.

49129879 is a deficient number, since it is larger than the sum of its proper divisors (1).

49129879 is an equidigital number, since it uses as much as digits as its factorization.

49129879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 49129879 is about 7009.2709321298. The cubic root of 49129879 is about 366.2535966286.

The spelling of 49129879 in words is "forty-nine million, one hundred twenty-nine thousand, eight hundred seventy-nine".