699645406 has 4 divisors (see below), whose sum is σ = 1049468112. Its totient is φ = 349822702.

The previous prime is 699645403. The next prime is 699645433. The reversal of 699645406 is 604546996.

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

It is a self number, because there is not a number n which added to its sum of digits gives 699645406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699645403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174911350 + ... + 174911353.

It is an arithmetic number, because the mean of its divisors is an integer number (262367028).

Almost surely, 2^699645406 is an apocalyptic number.

699645406 is a deficient number, since it is larger than the sum of its proper divisors (349822706).

699645406 is a wasteful number, since it uses less digits than its factorization.

699645406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349822705.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The square root of 699645406 is about 26450.8110650694. The cubic root of 699645406 is about 887.7540500238.

The spelling of 699645406 in words is "six hundred ninety-nine million, six hundred forty-five thousand, four hundred six".