139489331 has 2 divisors, whose sum is σ = 139489332. Its totient is φ = 139489330.

The previous prime is 139489327. The next prime is 139489379. The reversal of 139489331 is 133984931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139489331 - 2² = 139489327 is a prime.

It is a super-2 number, since 2×139489331² = 38914546925655122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139486331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69744665 + 69744666.

It is an arithmetic number, because the mean of its divisors is an integer number (69744666).

Almost surely, 2^139489331 is an apocalyptic number.

139489331 is a deficient number, since it is larger than the sum of its proper divisors (1).

139489331 is an equidigital number, since it uses as much as digits as its factorization.

139489331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 139489331 is about 11810.5601475967. The cubic root of 139489331 is about 518.6172967567.

The spelling of 139489331 in words is "one hundred thirty-nine million, four hundred eighty-nine thousand, three hundred thirty-one".