1622803981 has 2 divisors, whose sum is σ = 1622803982. Its totient is φ = 1622803980.

The previous prime is 1622803957. The next prime is 1622803991. The reversal of 1622803981 is 1893082261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1561040100 + 61763881 = 39510^2 + 7859^2 .

It is a cyclic number.

It is not a de Polignac number, because 1622803981 - 2¹³ = 1622795789 is a prime.

It is a super-2 number, since 2×1622803981² = 5266985521498896722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1622803991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811401990 + 811401991.

It is an arithmetic number, because the mean of its divisors is an integer number (811401991).

Almost surely, 2^1622803981 is an apocalyptic number.

It is an amenable number.

1622803981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622803981 is an equidigital number, since it uses as much as digits as its factorization.

1622803981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1622803981 is about 40284.0412694655. The cubic root of 1622803981 is about 1175.1375076132.

The spelling of 1622803981 in words is "one billion, six hundred twenty-two million, eight hundred three thousand, nine hundred eighty-one".