139743946 has 16 divisors (see below), whose sum is σ = 213359328. Its totient is φ = 68634000.

The previous prime is 139743913. The next prime is 139743983. The reversal of 139743946 is 649347931.

It is a junction number, because it is equal to n+sod(n) for n = 139743896 and 139743905.

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 7 ways as a sum of consecutive naturals, for example, 27721 + ... + 32371.

It is an arithmetic number, because the mean of its divisors is an integer number (13334958).

Almost surely, 2^139743946 is an apocalyptic number.

139743946 is a deficient number, since it is larger than the sum of its proper divisors (73615382).

139743946 is a wasteful number, since it uses less digits than its factorization.

139743946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4917.

The product of its digits is 489888, while the sum is 46.

The square root of 139743946 is about 11821.3343578464. The cubic root of 139743946 is about 518.9326553570.

The spelling of 139743946 in words is "one hundred thirty-nine million, seven hundred forty-three thousand, nine hundred forty-six".