68145499 has 4 divisors (see below), whose sum is σ = 69162664. Its totient is φ = 67128336.

The previous prime is 68145487. The next prime is 68145541. The reversal of 68145499 is 99454186.

It is a happy number.

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 68145499 - 2¹¹ = 68143451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68145599) 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, 508482 + ... + 508615.

It is an arithmetic number, because the mean of its divisors is an integer number (17290666).

Almost surely, 2^68145499 is an apocalyptic number.

68145499 is a deficient number, since it is larger than the sum of its proper divisors (1017165).

68145499 is a wasteful number, since it uses less digits than its factorization.

68145499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017164.

The product of its digits is 311040, while the sum is 46.

The square root of 68145499 is about 8255.0287098229. The cubic root of 68145499 is about 408.4564188523.

It can be divided in two parts, 68145 and 499, that added together give a square (68644 = 262²).

The spelling of 68145499 in words is "sixty-eight million, one hundred forty-five thousand, four hundred ninety-nine".