699983623 has 2 divisors, whose sum is σ = 699983624. Its totient is φ = 699983622.

The previous prime is 699983593. The next prime is 699983629. The reversal of 699983623 is 326389996.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 699983623 - 2⁵ = 699983591 is a prime.

It is a super-2 number, since 2×699983623² = 979954144936412258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699983629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349991811 + 349991812.

It is an arithmetic number, because the mean of its divisors is an integer number (349991812).

Almost surely, 2^699983623 is an apocalyptic number.

699983623 is a deficient number, since it is larger than the sum of its proper divisors (1).

699983623 is an equidigital number, since it uses as much as digits as its factorization.

699983623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 55.

The square root of 699983623 is about 26457.2036126269. The cubic root of 699983623 is about 887.8970773058.

The spelling of 699983623 in words is "six hundred ninety-nine million, nine hundred eighty-three thousand, six hundred twenty-three".