63251389 has 4 divisors (see below), whose sum is σ = 64960924. Its totient is φ = 61541856.

The previous prime is 63251387. The next prime is 63251401. The reversal of 63251389 is 98315236.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37576900 + 25674489 = 6130^2 + 5067^2 .

It is a cyclic number.

It is not a de Polignac number, because 63251389 - 2¹ = 63251387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1709497 = 63251389 / (6 + 3 + 2 + 5 + 1 + 3 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63251387) 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, 854712 + ... + 854785.

It is an arithmetic number, because the mean of its divisors is an integer number (16240231).

Almost surely, 2^63251389 is an apocalyptic number.

It is an amenable number.

63251389 is a deficient number, since it is larger than the sum of its proper divisors (1709535).

63251389 is a wasteful number, since it uses less digits than its factorization.

63251389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709534.

The product of its digits is 38880, while the sum is 37.

The square root of 63251389 is about 7953.0741854958. The cubic root of 63251389 is about 398.4342729940.

The spelling of 63251389 in words is "sixty-three million, two hundred fifty-one thousand, three hundred eighty-nine".