139502769 has 32 divisors (see below), whose sum is σ = 225607680. Its totient is φ = 74898432.

The previous prime is 139502767. The next prime is 139502773. The reversal of 139502769 is 967205931.

It is not a de Polignac number, because 139502769 - 2¹ = 139502767 is a prime.

It is a super-2 number, since 2×139502769² = 38922045117334722, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 139502769.

It is not an unprimeable number, because it can be changed into a prime (139502761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49297 + ... + 52049.

It is an arithmetic number, because the mean of its divisors is an integer number (7050240).

Almost surely, 2^139502769 is an apocalyptic number.

139502769 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

139502769 is a deficient number, since it is larger than the sum of its proper divisors (86104911).

139502769 is a wasteful number, since it uses less digits than its factorization.

139502769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 139502769 is about 11811.1290315532. The cubic root of 139502769 is about 518.6339502537.

The spelling of 139502769 in words is "one hundred thirty-nine million, five hundred two thousand, seven hundred sixty-nine".