2009751979 has 8 divisors (see below), whose sum is σ = 2075133312. Its totient is φ = 1944405120.

The previous prime is 2009751967. The next prime is 2009752027. The reversal of 2009751979 is 9791579002.

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-2009751979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009751929) 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, 166947 + ... + 178579.

It is an arithmetic number, because the mean of its divisors is an integer number (259391664).

Almost surely, 2^2009751979 is an apocalyptic number.

2009751979 is a deficient number, since it is larger than the sum of its proper divisors (65381333).

2009751979 is a wasteful number, since it uses less digits than its factorization.

2009751979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17237.

The product of its (nonzero) digits is 357210, while the sum is 49.

The square root of 2009751979 is about 44830.2574050161. The cubic root of 2009751979 is about 1261.9655178220.

The spelling of 2009751979 in words is "two billion, nine million, seven hundred fifty-one thousand, nine hundred seventy-nine".