699955921 has 8 divisors (see below), whose sum is σ = 800613504. Its totient is φ = 599464320.

The previous prime is 699955891. The next prime is 699955937. The reversal of 699955921 is 129559996.

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

It is not a de Polignac number, because 699955921 - 2²¹ = 697858769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699955121) 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, 32320 + ... + 49441.

It is an arithmetic number, because the mean of its divisors is an integer number (100076688).

Almost surely, 2^699955921 is an apocalyptic number.

It is an amenable number.

699955921 is a deficient number, since it is larger than the sum of its proper divisors (100657583).

699955921 is a wasteful number, since it uses less digits than its factorization.

699955921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82991.

The product of its digits is 1968300, while the sum is 55.

The square root of 699955921 is about 26456.6800827315. The cubic root of 699955921 is about 887.8853642464.

The spelling of 699955921 in words is "six hundred ninety-nine million, nine hundred fifty-five thousand, nine hundred twenty-one".