139494686 has 8 divisors (see below), whose sum is σ = 209630424. Its totient is φ = 69617880.

The previous prime is 139494683. The next prime is 139494689. The reversal of 139494686 is 686494931.

It is an interprime number because it is at equal distance from previous prime (139494683) and next prime (139494689).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139494683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63380 + ... + 65543.

It is an arithmetic number, because the mean of its divisors is an integer number (26203803).

Almost surely, 2^139494686 is an apocalyptic number.

139494686 is a deficient number, since it is larger than the sum of its proper divisors (70135738).

139494686 is a wasteful number, since it uses less digits than its factorization.

139494686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129466.

The product of its digits is 1119744, while the sum is 50.

The square root of 139494686 is about 11810.7868493170. The cubic root of 139494686 is about 518.6239332502.

The spelling of 139494686 in words is "one hundred thirty-nine million, four hundred ninety-four thousand, six hundred eighty-six".