61650637 has 2 divisors, whose sum is σ = 61650638. Its totient is φ = 61650636.

The previous prime is 61650629. The next prime is 61650679. The reversal of 61650637 is 73605616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53275401 + 8375236 = 7299^2 + 2894^2 .

It is a cyclic number.

It is not a de Polignac number, because 61650637 - 2³ = 61650629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61650697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30825318 + 30825319.

It is an arithmetic number, because the mean of its divisors is an integer number (30825319).

Almost surely, 2^61650637 is an apocalyptic number.

It is an amenable number.

61650637 is a deficient number, since it is larger than the sum of its proper divisors (1).

61650637 is an equidigital number, since it uses as much as digits as its factorization.

61650637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 61650637 is about 7851.7919610749. The cubic root of 61650637 is about 395.0443511595.

The spelling of 61650637 in words is "sixty-one million, six hundred fifty thousand, six hundred thirty-seven".