838653457 has 2 divisors, whose sum is σ = 838653458. Its totient is φ = 838653456.

The previous prime is 838653421. The next prime is 838653479. The reversal of 838653457 is 754356838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569824641 + 268828816 = 23871^2 + 16396^2 .

It is a cyclic number.

It is not a de Polignac number, because 838653457 - 2⁷ = 838653329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 838653457.

It is not a weakly prime, because it can be changed into another prime (838653157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419326728 + 419326729.

It is an arithmetic number, because the mean of its divisors is an integer number (419326729).

Almost surely, 2^838653457 is an apocalyptic number.

It is an amenable number.

838653457 is a deficient number, since it is larger than the sum of its proper divisors (1).

838653457 is an equidigital number, since it uses as much as digits as its factorization.

838653457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 49.

The square root of 838653457 is about 28959.5141015867. The cubic root of 838653457 is about 943.0343535805.

The spelling of 838653457 in words is "eight hundred thirty-eight million, six hundred fifty-three thousand, four hundred fifty-seven".