68945069 has 4 divisors (see below), whose sum is σ = 69889596. Its totient is φ = 68000544.

The previous prime is 68945059. The next prime is 68945087. The reversal of 68945069 is 96054986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96054986 = 2 ⋅48027493.

It can be written as a sum of positive squares in 2 ways, for example, as 20475625 + 48469444 = 4525^2 + 6962^2 .

It is a cyclic number.

It is not a de Polignac number, because 68945069 - 2²⁴ = 52167853 is a prime.

It is a super-2 number, since 2×68945069² = 9506845078829522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68945059) 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, 472154 + ... + 472299.

It is an arithmetic number, because the mean of its divisors is an integer number (17472399).

Almost surely, 2^68945069 is an apocalyptic number.

It is an amenable number.

68945069 is a deficient number, since it is larger than the sum of its proper divisors (944527).

68945069 is an equidigital number, since it uses as much as digits as its factorization.

68945069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944526.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 68945069 is about 8303.3167469391. The cubic root of 68945069 is about 410.0477219883.

The spelling of 68945069 in words is "sixty-eight million, nine hundred forty-five thousand, sixty-nine".