68925013 has 4 divisors (see below), whose sum is σ = 69569280. Its totient is φ = 68280748.

The previous prime is 68924941. The next prime is 68925019. The reversal of 68925013 is 31052986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68925013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68925013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68925019) 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, 321973 + ... + 322186.

It is an arithmetic number, because the mean of its divisors is an integer number (17392320).

Almost surely, 2^68925013 is an apocalyptic number.

It is an amenable number.

68925013 is a deficient number, since it is larger than the sum of its proper divisors (644267).

68925013 is a wasteful number, since it uses less digits than its factorization.

68925013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644266.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 68925013 is about 8302.1089489358. The cubic root of 68925013 is about 410.0079574105.

Adding to 68925013 its reverse (31052986), we get a palindrome (99977999).

The spelling of 68925013 in words is "sixty-eight million, nine hundred twenty-five thousand, thirteen".