139073899 has 2 divisors, whose sum is σ = 139073900. Its totient is φ = 139073898.

The previous prime is 139073849. The next prime is 139073903. The reversal of 139073899 is 998370931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139073899 - 2⁷ = 139073771 is a prime.

It is not a weakly prime, because it can be changed into another prime (139073849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69536949 + 69536950.

It is an arithmetic number, because the mean of its divisors is an integer number (69536950).

Almost surely, 2^139073899 is an apocalyptic number.

139073899 is a deficient number, since it is larger than the sum of its proper divisors (1).

139073899 is an equidigital number, since it uses as much as digits as its factorization.

139073899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 139073899 is about 11792.9597218001. The cubic root of 139073899 is about 518.1019300712.

The spelling of 139073899 in words is "one hundred thirty-nine million, seventy-three thousand, eight hundred ninety-nine".