1980000297 has 12 divisors (see below), whose sum is σ = 3120000624. Its totient is φ = 1200000120.

The previous prime is 1980000229. The next prime is 1980000299. The reversal of 1980000297 is 7920000891.

It is a happy number.

It is not a de Polignac number, because 1980000297 - 2²⁰ = 1978951721 is a prime.

It is a super-2 number, since 2×1980000297² = 7840802352240176418, which contains 22 as substring.

1980000297 is a modest number, since divided by 297 gives 198 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1980000299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9999903 + ... + 10000100.

It is an arithmetic number, because the mean of its divisors is an integer number (260000052).

Almost surely, 2^1980000297 is an apocalyptic number.

It is an amenable number.

1980000297 is a deficient number, since it is larger than the sum of its proper divisors (1140000327).

1980000297 is a wasteful number, since it uses less digits than its factorization.

1980000297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20000020 (or 20000017 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1980000297 is about 44497.1942598632. The cubic root of 1980000297 is about 1255.7072984292.

The spelling of 1980000297 in words is "one billion, nine hundred eighty million, two hundred ninety-seven", and thus it is an aban number.