103990639 has 2 divisors, whose sum is σ = 103990640. Its totient is φ = 103990638.

The previous prime is 103990631. The next prime is 103990643. The reversal of 103990639 is 936099301.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 103990639 - 2³ = 103990631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103990631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51995319 + 51995320.

It is an arithmetic number, because the mean of its divisors is an integer number (51995320).

Almost surely, 2^103990639 is an apocalyptic number.

103990639 is a deficient number, since it is larger than the sum of its proper divisors (1).

103990639 is an equidigital number, since it uses as much as digits as its factorization.

103990639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 103990639 is about 10197.5800560721. The cubic root of 103990639 is about 470.2528276054.

The spelling of 103990639 in words is "one hundred three million, nine hundred ninety thousand, six hundred thirty-nine".