63222749 has 2 divisors, whose sum is σ = 63222750. Its totient is φ = 63222748.

The previous prime is 63222727. The next prime is 63222767. The reversal of 63222749 is 94722236.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57486724 + 5736025 = 7582^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 63222749 - 2⁸ = 63222493 is a prime.

It is a super-2 number, since 2×63222749² = 7994231982234002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63222149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31611374 + 31611375.

It is an arithmetic number, because the mean of its divisors is an integer number (31611375).

Almost surely, 2^63222749 is an apocalyptic number.

It is an amenable number.

63222749 is a deficient number, since it is larger than the sum of its proper divisors (1).

63222749 is an equidigital number, since it uses as much as digits as its factorization.

63222749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 63222749 is about 7951.2734200252. The cubic root of 63222749 is about 398.3741273829.

The spelling of 63222749 in words is "sixty-three million, two hundred twenty-two thousand, seven hundred forty-nine".