1942567217 has 2 divisors, whose sum is σ = 1942567218. Its totient is φ = 1942567216.

The previous prime is 1942567147. The next prime is 1942567243. The reversal of 1942567217 is 7127652491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1929054241 + 13512976 = 43921^2 + 3676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1942567217 - 2¹⁴ = 1942550833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1942567817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971283608 + 971283609.

It is an arithmetic number, because the mean of its divisors is an integer number (971283609).

Almost surely, 2^1942567217 is an apocalyptic number.

It is an amenable number.

1942567217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1942567217 is an equidigital number, since it uses as much as digits as its factorization.

1942567217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 1942567217 is about 44074.5642859915. The cubic root of 1942567217 is about 1247.7436023465.

The spelling of 1942567217 in words is "one billion, nine hundred forty-two million, five hundred sixty-seven thousand, two hundred seventeen".