422678749 has 2 divisors, whose sum is σ = 422678750. Its totient is φ = 422678748.

The previous prime is 422678743. The next prime is 422678759. The reversal of 422678749 is 947876224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416894724 + 5784025 = 20418^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 422678749 - 2¹⁵ = 422645981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422678743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211339374 + 211339375.

It is an arithmetic number, because the mean of its divisors is an integer number (211339375).

Almost surely, 2^422678749 is an apocalyptic number.

It is an amenable number.

422678749 is a deficient number, since it is larger than the sum of its proper divisors (1).

422678749 is an equidigital number, since it uses as much as digits as its factorization.

422678749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The square root of 422678749 is about 20559.1524387558. The cubic root of 422678749 is about 750.4759935467.

The spelling of 422678749 in words is "four hundred twenty-two million, six hundred seventy-eight thousand, seven hundred forty-nine".