63145639 has 2 divisors, whose sum is σ = 63145640. Its totient is φ = 63145638.

The previous prime is 63145637. The next prime is 63145661. The reversal of 63145639 is 93654136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63145639 - 2¹ = 63145637 is a prime.

Together with 63145637, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 63145598 and 63145607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63145637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31572819 + 31572820.

It is an arithmetic number, because the mean of its divisors is an integer number (31572820).

Almost surely, 2^63145639 is an apocalyptic number.

63145639 is a deficient number, since it is larger than the sum of its proper divisors (1).

63145639 is an equidigital number, since it uses as much as digits as its factorization.

63145639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The square root of 63145639 is about 7946.4230317798. The cubic root of 63145639 is about 398.2121017058.

The spelling of 63145639 in words is "sixty-three million, one hundred forty-five thousand, six hundred thirty-nine".