139755237989 has 2 divisors, whose sum is σ = 139755237990. Its totient is φ = 139755237988.

The previous prime is 139755237971. The next prime is 139755237991. The reversal of 139755237989 is 989732557931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124726929889 + 15028308100 = 353167^2 + 122590^2 .

It is a cyclic number.

It is not a de Polignac number, because 139755237989 - 2³⁶ = 71035761253 is a prime.

Together with 139755237991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139755237949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69877618994 + 69877618995.

It is an arithmetic number, because the mean of its divisors is an integer number (69877618995).

Almost surely, 2^139755237989 is an apocalyptic number.

It is an amenable number.

139755237989 is a deficient number, since it is larger than the sum of its proper divisors (1).

139755237989 is an equidigital number, since it uses as much as digits as its factorization.

139755237989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128595600, while the sum is 68.

The spelling of 139755237989 in words is "one hundred thirty-nine billion, seven hundred fifty-five million, two hundred thirty-seven thousand, nine hundred eighty-nine".