139859961 has 8 divisors (see below), whose sum is σ = 187223904. Its totient is φ = 92868000.

The previous prime is 139859957. The next prime is 139859999. The reversal of 139859961 is 169958931.

It is a happy number.

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

It is not a de Polignac number, because 139859961 - 2² = 139859957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139859261) 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, 92116 + ... + 93621.

It is an arithmetic number, because the mean of its divisors is an integer number (23402988).

Almost surely, 2^139859961 is an apocalyptic number.

It is an amenable number.

139859961 is a deficient number, since it is larger than the sum of its proper divisors (47363943).

139859961 is a wasteful number, since it uses less digits than its factorization.

139859961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185991.

The product of its digits is 524880, while the sum is 51.

The square root of 139859961 is about 11826.2403577807. The cubic root of 139859961 is about 519.0762210737.

The spelling of 139859961 in words is "one hundred thirty-nine million, eight hundred fifty-nine thousand, nine hundred sixty-one".