139440851 has 8 divisors (see below), whose sum is σ = 161065584. Its totient is φ = 119307520.

The previous prime is 139440823. The next prime is 139440853. The reversal of 139440851 is 158044931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139440851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139440853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372650 + ... + 373023.

It is an arithmetic number, because the mean of its divisors is an integer number (20133198).

Almost surely, 2^139440851 is an apocalyptic number.

139440851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139440851 is a deficient number, since it is larger than the sum of its proper divisors (21624733).

139440851 is a wasteful number, since it uses less digits than its factorization.

139440851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745701.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 139440851 is about 11808.5075686981. The cubic root of 139440851 is about 518.5572073823.

The spelling of 139440851 in words is "one hundred thirty-nine million, four hundred forty thousand, eight hundred fifty-one".