1799981253 has 12 divisors (see below), whose sum is σ = 2971397728. Its totient is φ = 1028560680.

The previous prime is 1799981191. The next prime is 1799981299. The reversal of 1799981253 is 3521899971.

It is not a de Polignac number, because 1799981253 - 2¹⁰ = 1799980229 is a prime.

It is a super-2 number, since 2×1799981253² = 6479865022302900018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1799981253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1799981353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14285503 + ... + 14285628.

Almost surely, 2^1799981253 is an apocalyptic number.

It is an amenable number.

1799981253 is a deficient number, since it is larger than the sum of its proper divisors (1171416475).

1799981253 is a wasteful number, since it uses less digits than its factorization.

1799981253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28571144 (or 28571141 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 1799981253 is about 42426.1859351038. The cubic root of 1799981253 is about 1216.4361760244.

The spelling of 1799981253 in words is "one billion, seven hundred ninety-nine million, nine hundred eighty-one thousand, two hundred fifty-three".