68515037 has 2 divisors, whose sum is σ = 68515038. Its totient is φ = 68515036.

The previous prime is 68515021. The next prime is 68515043. The reversal of 68515037 is 73051586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37222201 + 31292836 = 6101^2 + 5594^2 .

It is a cyclic number.

It is not a de Polignac number, because 68515037 - 2⁴ = 68515021 is a prime.

It is a super-2 number, since 2×68515037² = 9388620590222738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68514988 and 68515006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68515087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34257518 + 34257519.

It is an arithmetic number, because the mean of its divisors is an integer number (34257519).

Almost surely, 2^68515037 is an apocalyptic number.

It is an amenable number.

68515037 is a deficient number, since it is larger than the sum of its proper divisors (1).

68515037 is an equidigital number, since it uses as much as digits as its factorization.

68515037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 68515037 is about 8277.3810471670. The cubic root of 68515037 is about 409.1934112725.

The spelling of 68515037 in words is "sixty-eight million, five hundred fifteen thousand, thirty-seven".