139358166 has 16 divisors (see below), whose sum is σ = 288327600. Its totient is φ = 44850848.

The previous prime is 139358117. The next prime is 139358171. The reversal of 139358166 is 661853931.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400281 + ... + 400628.

It is an arithmetic number, because the mean of its divisors is an integer number (18020475).

Almost surely, 2^139358166 is an apocalyptic number.

139358166 is an abundant number, since it is smaller than the sum of its proper divisors (148969434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139358166 is a wasteful number, since it uses less digits than its factorization.

139358166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800943.

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

The square root of 139358166 is about 11805.0059720442. The cubic root of 139358166 is about 518.4546898868.

The spelling of 139358166 in words is "one hundred thirty-nine million, three hundred fifty-eight thousand, one hundred sixty-six".