782868157 has 2 divisors, whose sum is σ = 782868158. Its totient is φ = 782868156.

The previous prime is 782868131. The next prime is 782868169. The reversal of 782868157 is 751868287.

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., 737991556 + 44876601 = 27166^2 + 6699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-782868157 is a prime.

It is a super-2 number, since 2×782868157² = 1225765102489153298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (782868197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391434078 + 391434079.

It is an arithmetic number, because the mean of its divisors is an integer number (391434079).

Almost surely, 2^782868157 is an apocalyptic number.

It is an amenable number.

782868157 is a deficient number, since it is larger than the sum of its proper divisors (1).

782868157 is an equidigital number, since it uses as much as digits as its factorization.

782868157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1505280, while the sum is 52.

The square root of 782868157 is about 27979.7812178723. The cubic root of 782868157 is about 921.6433125583.

The spelling of 782868157 in words is "seven hundred eighty-two million, eight hundred sixty-eight thousand, one hundred fifty-seven".