139226549 has 64 divisors (see below), whose sum is σ = 196411392. Its totient is φ = 95385600.

The previous prime is 139226539. The next prime is 139226551. The reversal of 139226549 is 945622931.

139226549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 139226549 - 2²⁰ = 138177973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139226539) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1907177 + ... + 1907249.

It is an arithmetic number, because the mean of its divisors is an integer number (3068928).

Almost surely, 2^139226549 is an apocalyptic number.

It is an amenable number.

139226549 is a deficient number, since it is larger than the sum of its proper divisors (57184843).

139226549 is a wasteful number, since it uses less digits than its factorization.

139226549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186.

The product of its digits is 116640, while the sum is 41.

The square root of 139226549 is about 11799.4300286073. The cubic root of 139226549 is about 518.2914200752.

The spelling of 139226549 in words is "one hundred thirty-nine million, two hundred twenty-six thousand, five hundred forty-nine".