1992571898 has 4 divisors (see below), whose sum is σ = 2988857850. Its totient is φ = 996285948.

The previous prime is 1992571877. The next prime is 1992571901. The reversal of 1992571898 is 8981752991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8981752991 = 647 ⋅13882153.

It can be written as a sum of positive squares in only one way, i.e., 1849602049 + 142969849 = 43007^2 + 11957^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498142973 + ... + 498142976.

Almost surely, 2^1992571898 is an apocalyptic number.

1992571898 is a deficient number, since it is larger than the sum of its proper divisors (996285952).

1992571898 is an equidigital number, since it uses as much as digits as its factorization.

1992571898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996285951.

The product of its digits is 3265920, while the sum is 59.

The square root of 1992571898 is about 44638.2335896034. The cubic root of 1992571898 is about 1258.3593111586.

The spelling of 1992571898 in words is "one billion, nine hundred ninety-two million, five hundred seventy-one thousand, eight hundred ninety-eight".