61502137 has 2 divisors, whose sum is σ = 61502138. Its totient is φ = 61502136.

The previous prime is 61502093. The next prime is 61502159. The reversal of 61502137 is 73120516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50353216 + 11148921 = 7096^2 + 3339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61502137 is a prime.

It is not a weakly prime, because it can be changed into another prime (61502537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30751068 + 30751069.

It is an arithmetic number, because the mean of its divisors is an integer number (30751069).

Almost surely, 2^61502137 is an apocalyptic number.

It is an amenable number.

61502137 is a deficient number, since it is larger than the sum of its proper divisors (1).

61502137 is an equidigital number, since it uses as much as digits as its factorization.

61502137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61502137 is about 7842.3298196391. The cubic root of 61502137 is about 394.7269105284.

The spelling of 61502137 in words is "sixty-one million, five hundred two thousand, one hundred thirty-seven".