61637113 has 2 divisors, whose sum is σ = 61637114. Its totient is φ = 61637112.

The previous prime is 61637099. The next prime is 61637129. The reversal of 61637113 is 31173616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31956409 + 29680704 = 5653^2 + 5448^2 .

It is a cyclic number.

It is not a de Polignac number, because 61637113 - 2¹⁷ = 61506041 is a prime.

It is not a weakly prime, because it can be changed into another prime (61637183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30818556 + 30818557.

It is an arithmetic number, because the mean of its divisors is an integer number (30818557).

Almost surely, 2^61637113 is an apocalyptic number.

It is an amenable number.

61637113 is a deficient number, since it is larger than the sum of its proper divisors (1).

61637113 is an equidigital number, since it uses as much as digits as its factorization.

61637113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 61637113 is about 7850.9307091580. The cubic root of 61637113 is about 395.0154627286.

The spelling of 61637113 in words is "sixty-one million, six hundred thirty-seven thousand, one hundred thirteen".