139283237491 has 6 divisors (see below), whose sum is σ = 143921181876. Its totient is φ = 134790228900.

The previous prime is 139283237449. The next prime is 139283237519. The reversal of 139283237491 is 194732382931.

It is not a de Polignac number, because 139283237491 - 2²³ = 139274848883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139283237441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72466905 + ... + 72468826.

It is an arithmetic number, because the mean of its divisors is an integer number (23986863646).

Almost surely, 2^139283237491 is an apocalyptic number.

139283237491 is a deficient number, since it is larger than the sum of its proper divisors (4637944385).

139283237491 is an equidigital number, since it uses as much as digits as its factorization.

139283237491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144935793 (or 144935762 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The spelling of 139283237491 in words is "one hundred thirty-nine billion, two hundred eighty-three million, two hundred thirty-seven thousand, four hundred ninety-one".