900139579109 has 2 divisors, whose sum is σ = 900139579110. Its totient is φ = 900139579108.

The previous prime is 900139579093. The next prime is 900139579169. The reversal of 900139579109 is 901975931009.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 881289112900 + 18850466209 = 938770^2 + 137297^2 .

It is a cyclic number.

It is not a de Polignac number, because 900139579109 - 2⁴ = 900139579093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900139579169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450069789554 + 450069789555.

It is an arithmetic number, because the mean of its divisors is an integer number (450069789555).

Almost surely, 2^900139579109 is an apocalyptic number.

It is an amenable number.

900139579109 is a deficient number, since it is larger than the sum of its proper divisors (1).

900139579109 is an equidigital number, since it uses as much as digits as its factorization.

900139579109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 688905, while the sum is 53.

The spelling of 900139579109 in words is "nine hundred billion, one hundred thirty-nine million, five hundred seventy-nine thousand, one hundred nine".