1822967381 has 4 divisors (see below), whose sum is σ = 1823158092. Its totient is φ = 1822776672.

The previous prime is 1822967353. The next prime is 1822967437. The reversal of 1822967381 is 1837692281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1837692281 = 67 ⋅27428243.

It can be written as a sum of positive squares in 2 ways, for example, as 1469188900 + 353778481 = 38330^2 + 18809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1822967381 is a prime.

It is a super-2 number, since 2×1822967381² = 6646420144379998322, 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 (1822907381) 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, 80216 + ... + 100401.

It is an arithmetic number, because the mean of its divisors is an integer number (455789523).

Almost surely, 2^1822967381 is an apocalyptic number.

It is an amenable number.

1822967381 is a deficient number, since it is larger than the sum of its proper divisors (190711).

1822967381 is a wasteful number, since it uses less digits than its factorization.

1822967381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190710.

The product of its digits is 290304, while the sum is 47.

The square root of 1822967381 is about 42696.2220928269. Note that the first 3 decimals coincide. The cubic root of 1822967381 is about 1221.5923355982.

The spelling of 1822967381 in words is "one billion, eight hundred twenty-two million, nine hundred sixty-seven thousand, three hundred eighty-one".