1819672149 has 8 divisors (see below), whose sum is σ = 2436382080. Its totient is φ = 1208038496.

The previous prime is 1819672139. The next prime is 1819672157. The reversal of 1819672149 is 9412769181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1819672149 - 2⁷ = 1819672021 is a prime.

It is a super-2 number, since 2×1819672149² = 6622413459692556402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1819672098 and 1819672107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819672139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268232 + ... + 1269665.

It is an arithmetic number, because the mean of its divisors is an integer number (304547760).

Almost surely, 2^1819672149 is an apocalyptic number.

It is an amenable number.

1819672149 is a deficient number, since it is larger than the sum of its proper divisors (616709931).

1819672149 is a wasteful number, since it uses less digits than its factorization.

1819672149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538139.

The product of its digits is 217728, while the sum is 48.

The square root of 1819672149 is about 42657.6153693570. The cubic root of 1819672149 is about 1220.8558334683.

The spelling of 1819672149 in words is "one billion, eight hundred nineteen million, six hundred seventy-two thousand, one hundred forty-nine".