813219742 has 16 divisors (see below), whose sum is σ = 1229980752. Its totient is φ = 403240320.

The previous prime is 813219713. The next prime is 813219749. The reversal of 813219742 is 247912318.

It is a super-2 number, since 2×813219742² = 1322652697557093128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813219749) 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, 120358 + ... + 126934.

It is an arithmetic number, because the mean of its divisors is an integer number (76873797).

Almost surely, 2^813219742 is an apocalyptic number.

813219742 is a deficient number, since it is larger than the sum of its proper divisors (416761010).

813219742 is a wasteful number, since it uses less digits than its factorization.

813219742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7083.

The product of its digits is 24192, while the sum is 37.

The square root of 813219742 is about 28517.0079426296. The cubic root of 813219742 is about 933.4032407105.

The spelling of 813219742 in words is "eight hundred thirteen million, two hundred nineteen thousand, seven hundred forty-two".