1972884917 has 2 divisors, whose sum is σ = 1972884918. Its totient is φ = 1972884916.

The previous prime is 1972884899. The next prime is 1972884937. The reversal of 1972884917 is 7194882791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1404825361 + 568059556 = 37481^2 + 23834^2 .

It is a cyclic number.

It is not a de Polignac number, because 1972884917 - 2²⁴ = 1956107701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972884937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986442458 + 986442459.

It is an arithmetic number, because the mean of its divisors is an integer number (986442459).

Almost surely, 2^1972884917 is an apocalyptic number.

It is an amenable number.

1972884917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972884917 is an equidigital number, since it uses as much as digits as its factorization.

1972884917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 56.

The square root of 1972884917 is about 44417.1691691400. The cubic root of 1972884917 is about 1254.2013123196.

The spelling of 1972884917 in words is "one billion, nine hundred seventy-two million, eight hundred eighty-four thousand, nine hundred seventeen".