139594669 has 2 divisors, whose sum is σ = 139594670. Its totient is φ = 139594668.

The previous prime is 139594639. The next prime is 139594687. The reversal of 139594669 is 966495931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134258569 + 5336100 = 11587^2 + 2310^2 .

It is a cyclic number.

It is not a de Polignac number, because 139594669 - 2¹⁹ = 139070381 is a prime.

It is a super-2 number, since 2×139594669² = 38973343226439122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139594619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69797334 + 69797335.

It is an arithmetic number, because the mean of its divisors is an integer number (69797335).

Almost surely, 2^139594669 is an apocalyptic number.

It is an amenable number.

139594669 is a deficient number, since it is larger than the sum of its proper divisors (1).

139594669 is an equidigital number, since it uses as much as digits as its factorization.

139594669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 52.

The square root of 139594669 is about 11815.0187896592. The cubic root of 139594669 is about 518.7478117874.

The spelling of 139594669 in words is "one hundred thirty-nine million, five hundred ninety-four thousand, six hundred sixty-nine".