699631369 has 4 divisors (see below), whose sum is σ = 703256596. Its totient is φ = 696006144.

The previous prime is 699631333. The next prime is 699631399. The reversal of 699631369 is 963136996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 449991369 + 249640000 = 21213^2 + 15800^2 .

It is a cyclic number.

It is not a de Polignac number, because 699631369 - 2⁷ = 699631241 is a prime.

It is a super-2 number, since 2×699631369² = 978968104977628322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699631399) 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, 1812324 + ... + 1812709.

It is an arithmetic number, because the mean of its divisors is an integer number (175814149).

Almost surely, 2^699631369 is an apocalyptic number.

It is an amenable number.

699631369 is a deficient number, since it is larger than the sum of its proper divisors (3625227).

699631369 is a wasteful number, since it uses less digits than its factorization.

699631369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3625226.

The product of its digits is 1417176, while the sum is 52.

The square root of 699631369 is about 26450.5457221586. The cubic root of 699631369 is about 887.7481129749.

The spelling of 699631369 in words is "six hundred ninety-nine million, six hundred thirty-one thousand, three hundred sixty-nine".