68153979 has 8 divisors (see below), whose sum is σ = 90953280. Its totient is φ = 45395336.

The previous prime is 68153951. The next prime is 68153993. The reversal of 68153979 is 97935186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68153979 - 2⁵ = 68153947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68153879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6009 + ... + 13130.

It is an arithmetic number, because the mean of its divisors is an integer number (11369160).

Almost surely, 2^68153979 is an apocalyptic number.

68153979 is a deficient number, since it is larger than the sum of its proper divisors (22799301).

68153979 is a wasteful number, since it uses less digits than its factorization.

68153979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20329.

The product of its digits is 408240, while the sum is 48.

The square root of 68153979 is about 8255.5423201629. The cubic root of 68153979 is about 408.4733608701.

The spelling of 68153979 in words is "sixty-eight million, one hundred fifty-three thousand, nine hundred seventy-nine".