139771388 has 12 divisors (see below), whose sum is σ = 249215400. Its totient is φ = 68566992.

The previous prime is 139771369. The next prime is 139771403. The reversal of 139771388 is 883177931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329438 + ... + 329861.

It is an arithmetic number, because the mean of its divisors is an integer number (20767950).

Almost surely, 2^139771388 is an apocalyptic number.

It is an amenable number.

139771388 is a deficient number, since it is larger than the sum of its proper divisors (109444012).

139771388 is a wasteful number, since it uses less digits than its factorization.

139771388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659356 (or 659354 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The square root of 139771388 is about 11822.4949989416. The cubic root of 139771388 is about 518.9666213314.

The spelling of 139771388 in words is "one hundred thirty-nine million, seven hundred seventy-one thousand, three hundred eighty-eight".