699999999979 has 8 divisors (see below), whose sum is σ = 847058823648. Its totient is φ = 564705882240.

The previous prime is 699999999953. The next prime is 699999999983. The reversal of 699999999979 is 979999999996.

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 699999999979 - 2⁹ = 699999999467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699999999989) 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, 2941176352 + ... + 2941176589.

It is an arithmetic number, because the mean of its divisors is an integer number (105882352956).

Almost surely, 2^699999999979 is an apocalyptic number.

699999999979 is a deficient number, since it is larger than the sum of its proper divisors (147058823669).

699999999979 is a wasteful number, since it uses less digits than its factorization.

699999999979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882352965.

The product of its digits is 146444944842, while the sum is 103.

The spelling of 699999999979 in words is "six hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-nine".