139653861 has 16 divisors (see below), whose sum is σ = 205732224. Its totient is φ = 83815424.

The previous prime is 139653859. The next prime is 139653863. The reversal of 139653861 is 168356931.

It is a happy number.

139653861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139653859) and next prime (139653863).

It is a cyclic number.

It is not a de Polignac number, because 139653861 - 2¹ = 139653859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139653863) 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, 58356 + ... + 60701.

It is an arithmetic number, because the mean of its divisors is an integer number (12858264).

Almost surely, 2^139653861 is an apocalyptic number.

It is an amenable number.

139653861 is a deficient number, since it is larger than the sum of its proper divisors (66078363).

139653861 is a wasteful number, since it uses less digits than its factorization.

139653861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119100.

The product of its digits is 116640, while the sum is 42.

The square root of 139653861 is about 11817.5234715231. The cubic root of 139653861 is about 518.8211225656.

The spelling of 139653861 in words is "one hundred thirty-nine million, six hundred fifty-three thousand, eight hundred sixty-one".