699673639 has 8 divisors (see below), whose sum is σ = 834393600. Its totient is φ = 573645336.

The previous prime is 699673621. The next prime is 699673657. The reversal of 699673639 is 936376996.

It is an interprime number because it is at equal distance from previous prime (699673621) and next prime (699673657).

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 699673639 - 2²³ = 691285031 is a prime.

It is a super-2 number, since 2×699673639² = 979086402223004642, 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 (699673609) 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, 2172739 + ... + 2173060.

It is an arithmetic number, because the mean of its divisors is an integer number (104299200).

Almost surely, 2^699673639 is an apocalyptic number.

699673639 is a deficient number, since it is larger than the sum of its proper divisors (134719961).

699673639 is a wasteful number, since it uses less digits than its factorization.

699673639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345829.

The product of its digits is 9920232, while the sum is 58.

The square root of 699673639 is about 26451.3447484244. The cubic root of 699673639 is about 887.7659911312.

The spelling of 699673639 in words is "six hundred ninety-nine million, six hundred seventy-three thousand, six hundred thirty-nine".