139546969 has 3 divisors (see below), whose sum is σ = 139558783. Its totient is φ = 139535156.

The previous prime is 139546951. The next prime is 139546991. The reversal of 139546969 is 969645931.

The square root of 139546969 is 11813.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 54686025 + 84860944 = 7395^2 + 9212^2 .

It is not a de Polignac number, because 139546969 - 2¹¹ = 139544921 is a prime.

It is a super-2 number, since 2×139546969² = 38946713114173922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139546909) 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 2 ways as a sum of consecutive naturals, for example, 5907 + ... + 17719.

Almost surely, 2^139546969 is an apocalyptic number.

139546969 is the 11813-rd square number.

139546969 is the 5907-th centered octagonal number.

It is an amenable number.

139546969 is a deficient number, since it is larger than the sum of its proper divisors (11814).

139546969 is an frugal number, since it uses more digits than its factorization.

139546969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23626 (or 11813 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 52.

The cubic root of 139546969 is about 518.6887190590.

The spelling of 139546969 in words is "one hundred thirty-nine million, five hundred forty-six thousand, nine hundred sixty-nine".