139663386 has 16 divisors (see below), whose sum is σ = 310363200. Its totient is φ = 46554444.

The previous prime is 139663369. The next prime is 139663387. The reversal of 139663386 is 683366931.

139663386 is a `hidden beast` number, since 1 + 3 + 9 + 6 + 633 + 8 + 6 = 666.

It is a super-2 number, since 2×139663386² = 39011722777969992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139663387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1293126 + ... + 1293233.

It is an arithmetic number, because the mean of its divisors is an integer number (19397700).

Almost surely, 2^139663386 is an apocalyptic number.

139663386 is an abundant number, since it is smaller than the sum of its proper divisors (170699814).

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

139663386 is a wasteful number, since it uses less digits than its factorization.

139663386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586370 (or 2586364 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 139663386 is about 11817.9264678707. The cubic root of 139663386 is about 518.8329175823.

The spelling of 139663386 in words is "one hundred thirty-nine million, six hundred sixty-three thousand, three hundred eighty-six".