139985355 has 16 divisors (see below), whose sum is σ = 224455680. Its totient is φ = 74499168.

The previous prime is 139985353. The next prime is 139985387. The reversal of 139985355 is 553589931.

It is a happy number.

It is not a de Polignac number, because 139985355 - 2¹ = 139985353 is a prime.

It is a super-2 number, since 2×139985355² = 39191799228952050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139985353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2557 + ... + 16926.

It is an arithmetic number, because the mean of its divisors is an integer number (14028480).

Almost surely, 2^139985355 is an apocalyptic number.

139985355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139985355 is a deficient number, since it is larger than the sum of its proper divisors (84470325).

139985355 is a wasteful number, since it uses less digits than its factorization.

139985355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19970.

The product of its digits is 729000, while the sum is 48.

The square root of 139985355 is about 11831.5406858110. The cubic root of 139985355 is about 519.2313038213.

The spelling of 139985355 in words is "one hundred thirty-nine million, nine hundred eighty-five thousand, three hundred fifty-five".