690084139 has 2 divisors, whose sum is σ = 690084140. Its totient is φ = 690084138.

The previous prime is 690084071. The next prime is 690084163. The reversal of 690084139 is 931480096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690084139 - 2⁹ = 690083627 is a prime.

It is a super-2 number, since 2×690084139² = 952432237798742642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (690084169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345042069 + 345042070.

It is an arithmetic number, because the mean of its divisors is an integer number (345042070).

Almost surely, 2^690084139 is an apocalyptic number.

690084139 is a deficient number, since it is larger than the sum of its proper divisors (1).

690084139 is an equidigital number, since it uses as much as digits as its factorization.

690084139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 690084139 is about 26269.4525828004. The cubic root of 690084139 is about 883.6915086056.

The spelling of 690084139 in words is "six hundred ninety million, eighty-four thousand, one hundred thirty-nine".