814504157 has 2 divisors, whose sum is σ = 814504158. Its totient is φ = 814504156.

The previous prime is 814504139. The next prime is 814504181. The reversal of 814504157 is 751405418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 460274116 + 354230041 = 21454^2 + 18821^2 .

It is a cyclic number.

It is not a de Polignac number, because 814504157 - 2¹⁶ = 814438621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (814504127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407252078 + 407252079.

It is an arithmetic number, because the mean of its divisors is an integer number (407252079).

Almost surely, 2^814504157 is an apocalyptic number.

It is an amenable number.

814504157 is a deficient number, since it is larger than the sum of its proper divisors (1).

814504157 is an equidigital number, since it uses as much as digits as its factorization.

814504157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 814504157 is about 28539.5192145908. The cubic root of 814504157 is about 933.8943939368.

The spelling of 814504157 in words is "eight hundred fourteen million, five hundred four thousand, one hundred fifty-seven".