139661434 has 8 divisors (see below), whose sum is σ = 228536928. Its totient is φ = 63482460.

The previous prime is 139661407. The next prime is 139661449. The reversal of 139661434 is 434166931.

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

It is a super-2 number, since 2×139661434² = 39010632293872712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139661393 and 139661402.

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 3 ways as a sum of consecutive naturals, for example, 3174102 + ... + 3174145.

It is an arithmetic number, because the mean of its divisors is an integer number (28567116).

Almost surely, 2^139661434 is an apocalyptic number.

139661434 is a deficient number, since it is larger than the sum of its proper divisors (88875494).

139661434 is a wasteful number, since it uses less digits than its factorization.

139661434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348260.

The product of its digits is 46656, while the sum is 37.

The square root of 139661434 is about 11817.8438811824. The cubic root of 139661434 is about 518.8305004215.

It can be divided in two parts, 13966 and 1434, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 139661434 in words is "one hundred thirty-nine million, six hundred sixty-one thousand, four hundred thirty-four".