1980217237 has 8 divisors (see below), whose sum is σ = 2073183840. Its totient is φ = 1888896240.

The previous prime is 1980217189. The next prime is 1980217243. The reversal of 1980217237 is 7327120891.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1980217237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1980217237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980217247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408939 + ... + 413752.

It is an arithmetic number, because the mean of its divisors is an integer number (259147980).

Almost surely, 2^1980217237 is an apocalyptic number.

It is an amenable number.

1980217237 is a deficient number, since it is larger than the sum of its proper divisors (92966603).

1980217237 is an equidigital number, since it uses as much as digits as its factorization.

1980217237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822803.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 1980217237 is about 44499.6318748818. The cubic root of 1980217237 is about 1255.7531575458.

The spelling of 1980217237 in words is "one billion, nine hundred eighty million, two hundred seventeen thousand, two hundred thirty-seven".