1981962098 has 8 divisors (see below), whose sum is σ = 2976852060. Its totient is φ = 989678080.

The previous prime is 1981962071. The next prime is 1981962107. The reversal of 1981962098 is 8902691891.

It can be written as a sum of positive squares in 2 ways, for example, as 1391812249 + 590149849 = 37307^2 + 24293^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649583 + ... + 652626.

Almost surely, 2^1981962098 is an apocalyptic number.

1981962098 is a deficient number, since it is larger than the sum of its proper divisors (994889962).

1981962098 is a wasteful number, since it uses less digits than its factorization.

1981962098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302972.

The product of its (nonzero) digits is 559872, while the sum is 53.

The square root of 1981962098 is about 44519.2328999501. The cubic root of 1981962098 is about 1256.1218833300.

The spelling of 1981962098 in words is "one billion, nine hundred eighty-one million, nine hundred sixty-two thousand, ninety-eight".