63351791 has 4 divisors (see below), whose sum is σ = 63850752. Its totient is φ = 62852832.

The previous prime is 63351787. The next prime is 63351793. The reversal of 63351791 is 19715336.

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 63351791 - 2² = 63351787 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 (63351793) 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, 249290 + ... + 249543.

It is an arithmetic number, because the mean of its divisors is an integer number (15962688).

Almost surely, 2^63351791 is an apocalyptic number.

63351791 is a deficient number, since it is larger than the sum of its proper divisors (498961).

63351791 is a wasteful number, since it uses less digits than its factorization.

63351791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498960.

The product of its digits is 17010, while the sum is 35.

The square root of 63351791 is about 7959.3838329358. The cubic root of 63351791 is about 398.6449795656.

The spelling of 63351791 in words is "sixty-three million, three hundred fifty-one thousand, seven hundred ninety-one".