7842774539 has 2 divisors, whose sum is σ = 7842774540. Its totient is φ = 7842774538.

The previous prime is 7842774487. The next prime is 7842774559. The reversal of 7842774539 is 9354772487.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7842774539 - 2¹² = 7842770443 is a prime.

It is a super-2 number, since 2×7842774539² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (7842774559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921387269 + 3921387270.

It is an arithmetic number, because the mean of its divisors is an integer number (3921387270).

Almost surely, 2^7842774539 is an apocalyptic number.

7842774539 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842774539 is an equidigital number, since it uses as much as digits as its factorization.

7842774539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 56.

The square root of 7842774539 is about 88559.4407107452. The cubic root of 7842774539 is about 1986.8110958345.

The spelling of 7842774539 in words is "seven billion, eight hundred forty-two million, seven hundred seventy-four thousand, five hundred thirty-nine".