1899731474 has 16 divisors (see below), whose sum is σ = 2935250136. Its totient is φ = 921571200.

The previous prime is 1899731369. The next prime is 1899731489. The reversal of 1899731474 is 4741379981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 772450849 + 1127280625 = 27793^2 + 33575^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49157 + ... + 78840.

Almost surely, 2^1899731474 is an apocalyptic number.

1899731474 is a deficient number, since it is larger than the sum of its proper divisors (1035518662).

1899731474 is a wasteful number, since it uses less digits than its factorization.

1899731474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128221.

The product of its digits is 1524096, while the sum is 53.

The square root of 1899731474 is about 43585.9091221005. The cubic root of 1899731474 is about 1238.5039784271.

The spelling of 1899731474 in words is "one billion, eight hundred ninety-nine million, seven hundred thirty-one thousand, four hundred seventy-four".