139763889 has 24 divisors (see below), whose sum is σ = 207315680. Its totient is φ = 90683712.

The previous prime is 139763887. The next prime is 139763891. The reversal of 139763889 is 988367931.

It is an interprime number because it is at equal distance from previous prime (139763887) and next prime (139763891).

It is not a de Polignac number, because 139763889 - 2¹ = 139763887 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139763887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157842 + ... + 158724.

Almost surely, 2^139763889 is an apocalyptic number.

It is an amenable number.

139763889 is a deficient number, since it is larger than the sum of its proper divisors (67551791).

139763889 is a wasteful number, since it uses less digits than its factorization.

139763889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1338 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 139763889 is about 11822.1778450504. The cubic root of 139763889 is about 518.9573399843.

The spelling of 139763889 in words is "one hundred thirty-nine million, seven hundred sixty-three thousand, eight hundred eighty-nine".