6972432781 has 4 divisors (see below), whose sum is σ = 6972652864. Its totient is φ = 6972212700.

The previous prime is 6972432767. The next prime is 6972432811. The reversal of 6972432781 is 1872342796.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6972432781 is a prime.

It is a super-2 number, since 2×6972432781² = 97229637771126787922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6972430781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52485 + ... + 129226.

It is an arithmetic number, because the mean of its divisors is an integer number (1743163216).

Almost surely, 2^6972432781 is an apocalyptic number.

It is an amenable number.

6972432781 is a deficient number, since it is larger than the sum of its proper divisors (220083).

6972432781 is a wasteful number, since it uses less digits than its factorization.

6972432781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220082.

The product of its digits is 1016064, while the sum is 49.

The square root of 6972432781 is about 83501.0944898329. The cubic root of 6972432781 is about 1910.4167270495.

The spelling of 6972432781 in words is "six billion, nine hundred seventy-two million, four hundred thirty-two thousand, seven hundred eighty-one".