68838515 has 4 divisors (see below), whose sum is σ = 82606224. Its totient is φ = 55070808.

The previous prime is 68838509. The next prime is 68838529. The reversal of 68838515 is 51583886.

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 68838515 - 2¹⁰ = 68837491 is a prime.

It is a super-2 number, since 2×68838515² = 9477482294810450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6883847 + ... + 6883856.

It is an arithmetic number, because the mean of its divisors is an integer number (20651556).

Almost surely, 2^68838515 is an apocalyptic number.

68838515 is a deficient number, since it is larger than the sum of its proper divisors (13767709).

68838515 is a wasteful number, since it uses less digits than its factorization.

68838515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13767708.

The product of its digits is 230400, while the sum is 44.

The square root of 68838515 is about 8296.8979142810. The cubic root of 68838515 is about 409.8363713503.

The spelling of 68838515 in words is "sixty-eight million, eight hundred thirty-eight thousand, five hundred fifteen".