699794639 has 2 divisors, whose sum is σ = 699794640. Its totient is φ = 699794638.

The previous prime is 699794611. The next prime is 699794657. The reversal of 699794639 is 936497996.

699794639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 699794639 - 2⁸ = 699794383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699794539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349897319 + 349897320.

It is an arithmetic number, because the mean of its divisors is an integer number (349897320).

Almost surely, 2^699794639 is an apocalyptic number.

699794639 is a deficient number, since it is larger than the sum of its proper divisors (1).

699794639 is an equidigital number, since it uses as much as digits as its factorization.

699794639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19840464, while the sum is 62.

The square root of 699794639 is about 26453.6318678551. The cubic root of 699794639 is about 887.8171642722.

The spelling of 699794639 in words is "six hundred ninety-nine million, seven hundred ninety-four thousand, six hundred thirty-nine".