1997799759 has 12 divisors (see below), whose sum is σ = 2888707536. Its totient is φ = 1330483392.

The previous prime is 1997799751. The next prime is 1997799779. The reversal of 1997799759 is 9579977991.

It is not a de Polignac number, because 1997799759 - 2³ = 1997799751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997799751) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106074 + ... + 123479.

It is an arithmetic number, because the mean of its divisors is an integer number (240725628).

Almost surely, 2^1997799759 is an apocalyptic number.

1997799759 is a deficient number, since it is larger than the sum of its proper divisors (890907777).

1997799759 is a wasteful number, since it uses less digits than its factorization.

1997799759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230526 (or 230523 counting only the distinct ones).

The product of its digits is 101269035, while the sum is 72.

The square root of 1997799759 is about 44696.7533384697. The cubic root of 1997799759 is about 1259.4588587063.

The spelling of 1997799759 in words is "one billion, nine hundred ninety-seven million, seven hundred ninety-nine thousand, seven hundred fifty-nine".