139018605 has 64 divisors (see below), whose sum is σ = 265939200. Its totient is φ = 61214720.

The previous prime is 139018597. The next prime is 139018631. The reversal of 139018605 is 506810931.

It is not a de Polignac number, because 139018605 - 2³ = 139018597 is a prime.

It is a super-2 number, since 2×139018605² = 38652345072292050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80491 + ... + 82199.

It is an arithmetic number, because the mean of its divisors is an integer number (4155300).

Almost surely, 2^139018605 is an apocalyptic number.

139018605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139018605 is a deficient number, since it is larger than the sum of its proper divisors (126920595).

139018605 is a wasteful number, since it uses less digits than its factorization.

139018605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 139018605 is about 11790.6151239026. The cubic root of 139018605 is about 518.0332574067.

The spelling of 139018605 in words is "one hundred thirty-nine million, eighteen thousand, six hundred five".