1939699898 has 16 divisors (see below), whose sum is σ = 3081969000. Its totient is φ = 912423936.

The previous prime is 1939699897. The next prime is 1939699913. The reversal of 1939699898 is 8989969391.

It can be written as a sum of positive squares in 4 ways, for example, as 1391812249 + 547887649 = 37307^2 + 23407^2 .

It is not an unprimeable number, because it can be changed into a prime (1939699891) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 83090 + ... + 103842.

Almost surely, 2^1939699898 is an apocalyptic number.

1939699898 is a deficient number, since it is larger than the sum of its proper divisors (1142269102).

1939699898 is a wasteful number, since it uses less digits than its factorization.

1939699898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23521.

The product of its digits is 68024448, while the sum is 71.

The square root of 1939699898 is about 44042.0242268677. The cubic root of 1939699898 is about 1247.1293909694.

The spelling of 1939699898 in words is "one billion, nine hundred thirty-nine million, six hundred ninety-nine thousand, eight hundred ninety-eight".