22393993 has 2 divisors, whose sum is σ = 22393994. Its totient is φ = 22393992.

The previous prime is 22393979. The next prime is 22394033. The reversal of 22393993 is 39939322.

It is an a-pointer prime, because the next prime (22394033) can be obtained adding 22393993 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22155849 + 238144 = 4707^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 22393993 - 2¹³ = 22385801 is a prime.

It is not a weakly prime, because it can be changed into another prime (22393933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11196996 + 11196997.

It is an arithmetic number, because the mean of its divisors is an integer number (11196997).

Almost surely, 2^22393993 is an apocalyptic number.

It is an amenable number.

22393993 is a deficient number, since it is larger than the sum of its proper divisors (1).

22393993 is an equidigital number, since it uses as much as digits as its factorization.

22393993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 40.

The square root of 22393993 is about 4732.2291787275. The cubic root of 22393993 is about 281.8667487420.

The spelling of 22393993 in words is "twenty-two million, three hundred ninety-three thousand, nine hundred ninety-three".