63009391 has 4 divisors (see below), whose sum is σ = 65041984. Its totient is φ = 60976800.

The previous prime is 63009379. The next prime is 63009433. The reversal of 63009391 is 19390036.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63009391 - 2¹⁵ = 62976623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 2032561 = 63009391 / (6 + 3 + 0 + 0 + 9 + 3 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63009311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1016250 + ... + 1016311.

It is an arithmetic number, because the mean of its divisors is an integer number (16260496).

Almost surely, 2^63009391 is an apocalyptic number.

63009391 is a deficient number, since it is larger than the sum of its proper divisors (2032593).

63009391 is a wasteful number, since it uses less digits than its factorization.

63009391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032592.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 63009391 is about 7937.8454885441. The cubic root of 63009391 is about 397.9254908794.

The spelling of 63009391 in words is "sixty-three million, nine thousand, three hundred ninety-one".