842748377 has 2 divisors, whose sum is σ = 842748378. Its totient is φ = 842748376.

The previous prime is 842748353. The next prime is 842748391. The reversal of 842748377 is 773847248.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 842682841 + 65536 = 29029^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 842748377 - 2⁸ = 842748121 is a prime.

It is a super-2 number, since 2×842748377² = 1420449653872268258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (842748307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421374188 + 421374189.

It is an arithmetic number, because the mean of its divisors is an integer number (421374189).

Almost surely, 2^842748377 is an apocalyptic number.

It is an amenable number.

842748377 is a deficient number, since it is larger than the sum of its proper divisors (1).

842748377 is an equidigital number, since it uses as much as digits as its factorization.

842748377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2107392, while the sum is 50.

The square root of 842748377 is about 29030.1287802862. The cubic root of 842748377 is about 944.5667235412.

The spelling of 842748377 in words is "eight hundred forty-two million, seven hundred forty-eight thousand, three hundred seventy-seven".