18872097 has 4 divisors (see below), whose sum is σ = 25162800. Its totient is φ = 12581396.

The previous prime is 18872093. The next prime is 18872123. The reversal of 18872097 is 79027881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18872097 - 2² = 18872093 is a prime.

It is a super-3 number, since 3×18872097³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18872093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3145347 + ... + 3145352.

It is an arithmetic number, because the mean of its divisors is an integer number (6290700).

Almost surely, 2^18872097 is an apocalyptic number.

It is an amenable number.

18872097 is a deficient number, since it is larger than the sum of its proper divisors (6290703).

18872097 is an equidigital number, since it uses as much as digits as its factorization.

18872097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6290702.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 18872097 is about 4344.2026886415. The cubic root of 18872097 is about 266.2400503236.

The spelling of 18872097 in words is "eighteen million, eight hundred seventy-two thousand, ninety-seven".