1920884237 has 4 divisors (see below), whose sum is σ = 1922366556. Its totient is φ = 1919401920.

The previous prime is 1920884209. The next prime is 1920884243. The reversal of 1920884237 is 7324880291.

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 1902617161 + 18267076 = 43619^2 + 4274^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920884237 - 2¹² = 1920880141 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 (1920884297) 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, 739214 + ... + 741807.

It is an arithmetic number, because the mean of its divisors is an integer number (480591639).

Almost surely, 2^1920884237 is an apocalyptic number.

It is an amenable number.

1920884237 is a deficient number, since it is larger than the sum of its proper divisors (1482319).

1920884237 is a wasteful number, since it uses less digits than its factorization.

1920884237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482318.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 1920884237 is about 43827.8933671241. The cubic root of 1920884237 is about 1243.0837737895.

The spelling of 1920884237 in words is "one billion, nine hundred twenty million, eight hundred eighty-four thousand, two hundred thirty-seven".