699406139 has 2 divisors, whose sum is σ = 699406140. Its totient is φ = 699406138.

The previous prime is 699406111. The next prime is 699406151. The reversal of 699406139 is 931604996.

699406139 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 a de Polignac number, because none of the positive numbers 2^k-699406139 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 699406093 and 699406102.

It is not a weakly prime, because it can be changed into another prime (699406109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349703069 + 349703070.

It is an arithmetic number, because the mean of its divisors is an integer number (349703070).

Almost surely, 2^699406139 is an apocalyptic number.

699406139 is a deficient number, since it is larger than the sum of its proper divisors (1).

699406139 is an equidigital number, since it uses as much as digits as its factorization.

699406139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 699406139 is about 26446.2878113356. The cubic root of 699406139 is about 887.6528394845.

The spelling of 699406139 in words is "six hundred ninety-nine million, four hundred six thousand, one hundred thirty-nine".