63129389 has 2 divisors, whose sum is σ = 63129390. Its totient is φ = 63129388.

The previous prime is 63129383. The next prime is 63129397. The reversal of 63129389 is 98392136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40424164 + 22705225 = 6358^2 + 4765^2 .

It is a cyclic number.

It is not a de Polignac number, because 63129389 - 2¹⁶ = 63063853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63129383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31564694 + 31564695.

It is an arithmetic number, because the mean of its divisors is an integer number (31564695).

Almost surely, 2^63129389 is an apocalyptic number.

It is an amenable number.

63129389 is a deficient number, since it is larger than the sum of its proper divisors (1).

63129389 is an equidigital number, since it uses as much as digits as its factorization.

63129389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 63129389 is about 7945.4004933672. The cubic root of 63129389 is about 398.1779399283.

The spelling of 63129389 in words is "sixty-three million, one hundred twenty-nine thousand, three hundred eighty-nine".