1992517 has 2 divisors, whose sum is σ = 1992518. Its totient is φ = 1992516.

The previous prime is 1992509. The next prime is 1992527. The reversal of 1992517 is 7152991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1833316 + 159201 = 1354^2 + 399^2 .

It is an emirp because it is prime and its reverse (7152991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1992517 - 2³ = 1992509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1992527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996258 + 996259.

It is an arithmetic number, because the mean of its divisors is an integer number (996259).

2^1992517 is an apocalyptic number.

It is an amenable number.

1992517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992517 is an equidigital number, since it uses as much as digits as its factorization.

1992517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 34.

The square root of 1992517 is about 1411.5654430454. The cubic root of 1992517 is about 125.8347754563.

The spelling of 1992517 in words is "one million, nine hundred ninety-two thousand, five hundred seventeen".