1868368457 has 2 divisors, whose sum is σ = 1868368458. Its totient is φ = 1868368456.

The previous prime is 1868368423. The next prime is 1868368531. The reversal of 1868368457 is 7548638681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1818510736 + 49857721 = 42644^2 + 7061^2 .

It is an emirp because it is prime and its reverse (7548638681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1868368457 - 2¹⁸ = 1868106313 is a prime.

It is a super-2 number, since 2×1868368457² = 6981601382225121698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1868368417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934184228 + 934184229.

It is an arithmetic number, because the mean of its divisors is an integer number (934184229).

Almost surely, 2^1868368457 is an apocalyptic number.

It is an amenable number.

1868368457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868368457 is an equidigital number, since it uses as much as digits as its factorization.

1868368457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 56.

The square root of 1868368457 is about 43224.6278989189. The cubic root of 1868368457 is about 1231.6505606561.

The spelling of 1868368457 in words is "one billion, eight hundred sixty-eight million, three hundred sixty-eight thousand, four hundred fifty-seven".