3722392781 has 2 divisors, whose sum is σ = 3722392782. Its totient is φ = 3722392780.

The previous prime is 3722392763. The next prime is 3722392783. The reversal of 3722392781 is 1872932273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3277562500 + 444830281 = 57250^2 + 21091^2 .

It is an emirp because it is prime and its reverse (1872932273) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3722392781 is a prime.

It is a super-2 number, since 2×3722392781² = 27712416032081827922, which contains 22 as substring.

Together with 3722392783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3722392783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1861196390 + 1861196391.

It is an arithmetic number, because the mean of its divisors is an integer number (1861196391).

Almost surely, 2^3722392781 is an apocalyptic number.

It is an amenable number.

3722392781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3722392781 is an equidigital number, since it uses as much as digits as its factorization.

3722392781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 3722392781 is about 61011.4151696222. The cubic root of 3722392781 is about 1549.7943231772.

The spelling of 3722392781 in words is "three billion, seven hundred twenty-two million, three hundred ninety-two thousand, seven hundred eighty-one".