101230639 has 2 divisors, whose sum is σ = 101230640. Its totient is φ = 101230638.

The previous prime is 101230609. The next prime is 101230663. The reversal of 101230639 is 936032101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101230639 - 2⁷ = 101230511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101230609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50615319 + 50615320.

It is an arithmetic number, because the mean of its divisors is an integer number (50615320).

Almost surely, 2^101230639 is an apocalyptic number.

101230639 is a deficient number, since it is larger than the sum of its proper divisors (1).

101230639 is an equidigital number, since it uses as much as digits as its factorization.

101230639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 101230639 is about 10061.3437969289. The cubic root of 101230639 is about 466.0551657877.

The spelling of 101230639 in words is "one hundred one million, two hundred thirty thousand, six hundred thirty-nine".