49079981 has 2 divisors, whose sum is σ = 49079982. Its totient is φ = 49079980.

The previous prime is 49079971. The next prime is 49080013. The reversal of 49079981 is 18997094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48177481 + 902500 = 6941^2 + 950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49079981 is a prime.

It is a super-2 number, since 2×49079981² = 4817689069920722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49079941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24539990 + 24539991.

It is an arithmetic number, because the mean of its divisors is an integer number (24539991).

Almost surely, 2^49079981 is an apocalyptic number.

It is an amenable number.

49079981 is a deficient number, since it is larger than the sum of its proper divisors (1).

49079981 is an equidigital number, since it uses as much as digits as its factorization.

49079981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 49079981 is about 7005.7105992183. The cubic root of 49079981 is about 366.1295613650.

The spelling of 49079981 in words is "forty-nine million, seventy-nine thousand, nine hundred eighty-one".