139618474 has 8 divisors (see below), whose sum is σ = 210102048. Its totient is φ = 69584460.

The previous prime is 139618471. The next prime is 139618519. The reversal of 139618474 is 474816931.

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

It is a self number, because there is not a number n which added to its sum of digits gives 139618474.

It is not an unprimeable number, because it can be changed into a prime (139618471) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 111612 + ... + 112855.

It is an arithmetic number, because the mean of its divisors is an integer number (26262756).

Almost surely, 2^139618474 is an apocalyptic number.

139618474 is a deficient number, since it is larger than the sum of its proper divisors (70483574).

139618474 is a wasteful number, since it uses less digits than its factorization.

139618474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224780.

The product of its digits is 145152, while the sum is 43.

The square root of 139618474 is about 11816.0261509528. The cubic root of 139618474 is about 518.7772973684. Note that the first 3 decimals are identical.

The spelling of 139618474 in words is "one hundred thirty-nine million, six hundred eighteen thousand, four hundred seventy-four".