1807818397 has 24 divisors (see below), whose sum is σ = 2301309792. Its totient is φ = 1404295200.

The previous prime is 1807818379. The next prime is 1807818449. The reversal of 1807818397 is 7938187081.

It is a de Polignac number, because none of the positive numbers 2^k-1807818397 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 (1807818317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173343 + ... + 183475.

It is an arithmetic number, because the mean of its divisors is an integer number (95887908).

Almost surely, 2^1807818397 is an apocalyptic number.

It is an amenable number.

1807818397 is a deficient number, since it is larger than the sum of its proper divisors (493491395).

1807818397 is a wasteful number, since it uses less digits than its factorization.

1807818397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10489 (or 10482 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 52.

The square root of 1807818397 is about 42518.4477256637. The cubic root of 1807818397 is about 1218.1990800674.

The spelling of 1807818397 in words is "one billion, eight hundred seven million, eight hundred eighteen thousand, three hundred ninety-seven".