139553569 has 4 divisors (see below), whose sum is σ = 140652544. Its totient is φ = 138454596.

The previous prime is 139553551. The next prime is 139553593. The reversal of 139553569 is 965355931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139553569 is a prime.

It is a super-2 number, since 2×139553569² = 38950397241275522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139553369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549297 + ... + 549550.

It is an arithmetic number, because the mean of its divisors is an integer number (35163136).

Almost surely, 2^139553569 is an apocalyptic number.

It is an amenable number.

139553569 is a deficient number, since it is larger than the sum of its proper divisors (1098975).

139553569 is a wasteful number, since it uses less digits than its factorization.

139553569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098974.

The product of its digits is 546750, while the sum is 46.

The square root of 139553569 is about 11813.2793499519. The cubic root of 139553569 is about 518.6968962140.

The spelling of 139553569 in words is "one hundred thirty-nine million, five hundred fifty-three thousand, five hundred sixty-nine".