63994733 has 4 divisors (see below), whose sum is σ = 69812448. Its totient is φ = 58177020.

The previous prime is 63994729. The next prime is 63994739. The reversal of 63994733 is 33749936.

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 63994733 - 2² = 63994729 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 (63994739) 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, 2908841 + ... + 2908862.

It is an arithmetic number, because the mean of its divisors is an integer number (17453112).

Almost surely, 2^63994733 is an apocalyptic number.

It is an amenable number.

63994733 is a deficient number, since it is larger than the sum of its proper divisors (5817715).

63994733 is a wasteful number, since it uses less digits than its factorization.

63994733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5817714.

The product of its digits is 367416, while the sum is 44.

The square root of 63994733 is about 7999.6708057269. The cubic root of 63994733 is about 399.9890267823.

The spelling of 63994733 in words is "sixty-three million, nine hundred ninety-four thousand, seven hundred thirty-three".