1813430997 has 48 divisors (see below), whose sum is σ = 3155548032. Its totient is φ = 1019200320.

The previous prime is 1813430897. The next prime is 1813430999. The reversal of 1813430997 is 7990343181.

It is not a de Polignac number, because 1813430997 - 2⁷ = 1813430869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813430999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95023 + ... + 112499.

It is an arithmetic number, because the mean of its divisors is an integer number (65740584).

Almost surely, 2^1813430997 is an apocalyptic number.

It is an amenable number.

1813430997 is a deficient number, since it is larger than the sum of its proper divisors (1342117035).

1813430997 is an equidigital number, since it uses as much as digits as its factorization.

1813430997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17560 (or 17548 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1813430997 is about 42584.3985163581. The cubic root of 1813430997 is about 1219.4584618414.

The spelling of 1813430997 in words is "one billion, eight hundred thirteen million, four hundred thirty thousand, nine hundred ninety-seven".