2139974059 has 4 divisors (see below), whose sum is σ = 2265854904. Its totient is φ = 2014093216.

The previous prime is 2139974033. The next prime is 2139974063. The reversal of 2139974059 is 9504799312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2139974059 - 2⁷ = 2139973931 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139974029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62940397 + ... + 62940430.

It is an arithmetic number, because the mean of its divisors is an integer number (566463726).

Almost surely, 2^2139974059 is an apocalyptic number.

2139974059 is a deficient number, since it is larger than the sum of its proper divisors (125880845).

2139974059 is a wasteful number, since it uses less digits than its factorization.

2139974059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125880844.

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 2139974059 is about 46259.8536422242. The cubic root of 2139974059 is about 1288.6535354967.

The spelling of 2139974059 in words is "two billion, one hundred thirty-nine million, nine hundred seventy-four thousand, fifty-nine".