747996781 has 8 divisors (see below), whose sum is σ = 855025920. Its totient is φ = 641010768.

The previous prime is 747996757. The next prime is 747996803. The reversal of 747996781 is 187699747.

747996781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 747996781 - 2⁹ = 747996269 is a prime.

It is a super-2 number, since 2×747996781² = 1118998368772723922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747996881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47175 + ... + 61003.

It is an arithmetic number, because the mean of its divisors is an integer number (106878240).

Almost surely, 2^747996781 is an apocalyptic number.

It is an amenable number.

747996781 is a deficient number, since it is larger than the sum of its proper divisors (107029139).

747996781 is a wasteful number, since it uses less digits than its factorization.

747996781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21563.

The product of its digits is 5334336, while the sum is 58.

The square root of 747996781 is about 27349.5298131430. The cubic root of 747996781 is about 907.7506661587.

The spelling of 747996781 in words is "seven hundred forty-seven million, nine hundred ninety-six thousand, seven hundred eighty-one".