1990955674 has 4 divisors (see below), whose sum is σ = 2986433514. Its totient is φ = 995477836.

The previous prime is 1990955639. The next prime is 1990955711. The reversal of 1990955674 is 4765590991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1489419649 + 501536025 = 38593^2 + 22395^2 .

It is a super-3 number, since 3×1990955674³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497738917 + ... + 497738920.

Almost surely, 2^1990955674 is an apocalyptic number.

1990955674 is a deficient number, since it is larger than the sum of its proper divisors (995477840).

1990955674 is an equidigital number, since it uses as much as digits as its factorization.

1990955674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995477839.

The product of its (nonzero) digits is 3061800, while the sum is 55.

The square root of 1990955674 is about 44620.1263333039. The cubic root of 1990955674 is about 1258.0189904145.

The spelling of 1990955674 in words is "one billion, nine hundred ninety million, nine hundred fifty-five thousand, six hundred seventy-four".