139641489 has 45 divisors (see below), whose sum is σ = 228139329. Its totient is φ = 85082400.

The previous prime is 139641479. The next prime is 139641499. The reversal of 139641489 is 984146931.

The square root of 139641489 is 11817.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (139641479) and next prime (139641499).

It can be written as a sum of positive squares in 4 ways, for example, as 5267025 + 134374464 = 2295^2 + 11592^2 .

It is not a de Polignac number, because 139641489 - 2⁵ = 139641457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139641479) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1382539 + ... + 1382639.

Almost surely, 2^139641489 is an apocalyptic number.

139641489 is the 11817-th square number.

139641489 is the 5909-th centered octagonal number.

It is an amenable number.

139641489 is a deficient number, since it is larger than the sum of its proper divisors (88497840).

139641489 is an equidigital number, since it uses as much as digits as its factorization.

139641489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 117 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The cubic root of 139641489 is about 518.8058012456.

Multiplying 139641489 by its product of digits (186624), we get a square (26060453243136 = 5104944²).

The spelling of 139641489 in words is "one hundred thirty-nine million, six hundred forty-one thousand, four hundred eighty-nine".