63307389 has 4 divisors (see below), whose sum is σ = 84409856. Its totient is φ = 42204924.

The previous prime is 63307367. The next prime is 63307393. The reversal of 63307389 is 98370336.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 63307389 - 2⁹ = 63306877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63307399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10551229 + ... + 10551234.

It is an arithmetic number, because the mean of its divisors is an integer number (21102464).

Almost surely, 2^63307389 is an apocalyptic number.

It is an amenable number.

63307389 is a deficient number, since it is larger than the sum of its proper divisors (21102467).

63307389 is a wasteful number, since it uses less digits than its factorization.

63307389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21102466.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 63307389 is about 7956.5940577611. The cubic root of 63307389 is about 398.5518237076.

The spelling of 63307389 in words is "sixty-three million, three hundred seven thousand, three hundred eighty-nine".