63509749 has 2 divisors, whose sum is σ = 63509750. Its totient is φ = 63509748.

The previous prime is 63509711. The next prime is 63509767. The reversal of 63509749 is 94790536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45995524 + 17514225 = 6782^2 + 4185^2 .

It is a cyclic number.

It is not a de Polignac number, because 63509749 - 2¹¹ = 63507701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63509249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31754874 + 31754875.

It is an arithmetic number, because the mean of its divisors is an integer number (31754875).

Almost surely, 2^63509749 is an apocalyptic number.

It is an amenable number.

63509749 is a deficient number, since it is larger than the sum of its proper divisors (1).

63509749 is an equidigital number, since it uses as much as digits as its factorization.

63509749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 63509749 is about 7969.3004084424. The cubic root of 63509749 is about 398.9760246731.

The spelling of 63509749 in words is "sixty-three million, five hundred nine thousand, seven hundred forty-nine".