699689 has 4 divisors (see below), whose sum is σ = 714624. Its totient is φ = 684756.

The previous prime is 699649. The next prime is 699697. The reversal of 699689 is 986996.

It is a happy number.

699689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 699689 - 2¹² = 695593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 14887 = 699689 / (6 + 9 + 9 + 6 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699649) 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, 7397 + ... + 7490.

It is an arithmetic number, because the mean of its divisors is an integer number (178656).

2⁶⁹⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

699689 is a deficient number, since it is larger than the sum of its proper divisors (14935).

699689 is a wasteful number, since it uses less digits than its factorization.

699689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14934.

The product of its digits is 209952, while the sum is 47.

The square root of 699689 is about 836.4741478372. The cubic root of 699689 is about 88.7772487910. Note that the first 3 decimals are identical.

The spelling of 699689 in words is "six hundred ninety-nine thousand, six hundred eighty-nine".