4638457 has 2 divisors, whose sum is σ = 4638458. Its totient is φ = 4638456.

The previous prime is 4638449. The next prime is 4638461. The reversal of 4638457 is 7548364.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3606201 + 1032256 = 1899^2 + 1016^2 .

It is a cyclic number.

It is not a de Polignac number, because 4638457 - 2³ = 4638449 is a prime.

It is not a weakly prime, because it can be changed into another prime (4638407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2319228 + 2319229.

It is an arithmetic number, because the mean of its divisors is an integer number (2319229).

Almost surely, 2^4638457 is an apocalyptic number.

It is an amenable number.

4638457 is a deficient number, since it is larger than the sum of its proper divisors (1).

4638457 is an equidigital number, since it uses as much as digits as its factorization.

4638457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 4638457 is about 2153.7077331894. The cubic root of 4638457 is about 166.7725278573.

It can be divided in two parts, 46 and 38457, that added together give a triangular number (38503 = T₂₇₇).

The spelling of 4638457 in words is "four million, six hundred thirty-eight thousand, four hundred fifty-seven".