63213739 has 2 divisors, whose sum is σ = 63213740. Its totient is φ = 63213738.

The previous prime is 63213691. The next prime is 63213749. The reversal of 63213739 is 93731236.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63213739 - 2²⁵ = 29659307 is a prime.

It is not a weakly prime, because it can be changed into another prime (63213749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31606869 + 31606870.

It is an arithmetic number, because the mean of its divisors is an integer number (31606870).

Almost surely, 2^63213739 is an apocalyptic number.

63213739 is a deficient number, since it is larger than the sum of its proper divisors (1).

63213739 is an equidigital number, since it uses as much as digits as its factorization.

63213739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 34.

The square root of 63213739 is about 7950.7068239245. The cubic root of 63213739 is about 398.3552021202.

The spelling of 63213739 in words is "sixty-three million, two hundred thirteen thousand, seven hundred thirty-nine".