139969147 has 4 divisors (see below), whose sum is σ = 140124376. Its totient is φ = 139813920.

The previous prime is 139969129. The next prime is 139969153. The reversal of 139969147 is 741969931.

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

It is a cyclic number.

It is not a de Polignac number, because 139969147 - 2¹¹ = 139967099 is a prime.

It is a super-2 number, since 2×139969147² = 39182724223815218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139969147.

It is not an unprimeable number, because it can be changed into a prime (139969117) 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, 76254 + ... + 78067.

It is an arithmetic number, because the mean of its divisors is an integer number (35031094).

Almost surely, 2^139969147 is an apocalyptic number.

139969147 is a deficient number, since it is larger than the sum of its proper divisors (155229).

139969147 is an equidigital number, since it uses as much as digits as its factorization.

139969147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155228.

The product of its digits is 367416, while the sum is 49.

The square root of 139969147 is about 11830.8557171491. The cubic root of 139969147 is about 519.2112635683.

The spelling of 139969147 in words is "one hundred thirty-nine million, nine hundred sixty-nine thousand, one hundred forty-seven".