2023797991 has 16 divisors (see below), whose sum is σ = 2180395008. Its totient is φ = 1873476000.

The previous prime is 2023797989. The next prime is 2023798001. The reversal of 2023797991 is 1997973202.

It is a cyclic number.

It is not a de Polignac number, because 2023797991 - 2¹ = 2023797989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2023794991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156316 + ... + 168766.

It is an arithmetic number, because the mean of its divisors is an integer number (136274688).

Almost surely, 2^2023797991 is an apocalyptic number.

2023797991 is a deficient number, since it is larger than the sum of its proper divisors (156597017).

2023797991 is a wasteful number, since it uses less digits than its factorization.

2023797991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12702.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 2023797991 is about 44986.6423619278. The cubic root of 2023797991 is about 1264.8986240476.

The spelling of 2023797991 in words is "two billion, twenty-three million, seven hundred ninety-seven thousand, nine hundred ninety-one".