1988296973 has 4 divisors (see below), whose sum is σ = 2141242908. Its totient is φ = 1835351040.

The previous prime is 1988296969. The next prime is 1988296997. The reversal of 1988296973 is 3796928891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 765186244 + 1223110729 = 27662^2 + 34973^2 .

It is a cyclic number.

It is not a de Polignac number, because 1988296973 - 2² = 1988296969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988296913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76472948 + ... + 76472973.

It is an arithmetic number, because the mean of its divisors is an integer number (535310727).

Almost surely, 2^1988296973 is an apocalyptic number.

1988296973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1988296973 is a deficient number, since it is larger than the sum of its proper divisors (152945935).

1988296973 is a wasteful number, since it uses less digits than its factorization.

1988296973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152945934.

The product of its digits is 11757312, while the sum is 62.

The square root of 1988296973 is about 44590.3237597576. The cubic root of 1988296973 is about 1257.4587592449.

The spelling of 1988296973 in words is "one billion, nine hundred eighty-eight million, two hundred ninety-six thousand, nine hundred seventy-three".