68612507 has 4 divisors (see below), whose sum is σ = 68776680. Its totient is φ = 68448336.

The previous prime is 68612497. The next prime is 68612513. The reversal of 68612507 is 70521686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68612507 - 2⁴ = 68612491 is a prime.

It is a super-2 number, since 2×68612507² = 9415352233650098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68612407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81458 + ... + 82295.

It is an arithmetic number, because the mean of its divisors is an integer number (17194170).

Almost surely, 2^68612507 is an apocalyptic number.

68612507 is a deficient number, since it is larger than the sum of its proper divisors (164173).

68612507 is a wasteful number, since it uses less digits than its factorization.

68612507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164172.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 68612507 is about 8283.2666865193. The cubic root of 68612507 is about 409.3873598584.

The spelling of 68612507 in words is "sixty-eight million, six hundred twelve thousand, five hundred seven".