139143851 has 8 divisors (see below), whose sum is σ = 173478144. Its totient is φ = 108423720.

The previous prime is 139143847. The next prime is 139143853. The reversal of 139143851 is 158341931.

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

It is a cyclic number.

It is not a de Polignac number, because 139143851 - 2² = 139143847 is a prime.

It is a super-2 number, since 2×139143851² = 38722022542220402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139143853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903455 + ... + 903608.

It is an arithmetic number, because the mean of its divisors is an integer number (21684768).

Almost surely, 2^139143851 is an apocalyptic number.

139143851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139143851 is a deficient number, since it is larger than the sum of its proper divisors (34334293).

139143851 is a wasteful number, since it uses less digits than its factorization.

139143851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807081.

The product of its digits is 12960, while the sum is 35.

The square root of 139143851 is about 11795.9251862667. The cubic root of 139143851 is about 518.1887812387.

The spelling of 139143851 in words is "one hundred thirty-nine million, one hundred forty-three thousand, eight hundred fifty-one".