49158961 has 2 divisors, whose sum is σ = 49158962. Its totient is φ = 49158960.

The previous prime is 49158911. The next prime is 49158971. The reversal of 49158961 is 16985194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46662561 + 2496400 = 6831^2 + 1580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49158961 is a prime.

It is not a weakly prime, because it can be changed into another prime (49158911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24579480 + 24579481.

It is an arithmetic number, because the mean of its divisors is an integer number (24579481).

Almost surely, 2^49158961 is an apocalyptic number.

It is an amenable number.

49158961 is a deficient number, since it is larger than the sum of its proper divisors (1).

49158961 is an equidigital number, since it uses as much as digits as its factorization.

49158961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 43.

The square root of 49158961 is about 7011.3451633763. The cubic root of 49158961 is about 366.3258492397.

The spelling of 49158961 in words is "forty-nine million, one hundred fifty-eight thousand, nine hundred sixty-one".