139598069 has 4 divisors (see below), whose sum is σ = 150336396. Its totient is φ = 128859744.

The previous prime is 139598047. The next prime is 139598087. The reversal of 139598069 is 960895931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20133169 + 119464900 = 4487^2 + 10930^2 .

It is a de Polignac number, because none of the positive numbers 2^k-139598069 is a prime.

It is a super-2 number, since 2×139598069² = 38975241737057522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139598009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5369144 + ... + 5369169.

It is an arithmetic number, because the mean of its divisors is an integer number (37584099).

Almost surely, 2^139598069 is an apocalyptic number.

It is an amenable number.

139598069 is a deficient number, since it is larger than the sum of its proper divisors (10738327).

139598069 is a wasteful number, since it uses less digits than its factorization.

139598069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738326.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 139598069 is about 11815.1626734464. The cubic root of 139598069 is about 518.7520233337.

The spelling of 139598069 in words is "one hundred thirty-nine million, five hundred ninety-eight thousand, sixty-nine".