22993393 has 2 divisors, whose sum is σ = 22993394. Its totient is φ = 22993392.

The previous prime is 22993349. The next prime is 22993423. The reversal of 22993393 is 39339922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16378209 + 6615184 = 4047^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 22993393 - 2¹³ = 22985201 is a prime.

It is a super-2 number, since 2×22993393² = 1057392243304898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22993343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11496696 + 11496697.

It is an arithmetic number, because the mean of its divisors is an integer number (11496697).

Almost surely, 2^22993393 is an apocalyptic number.

It is an amenable number.

22993393 is a deficient number, since it is larger than the sum of its proper divisors (1).

22993393 is an equidigital number, since it uses as much as digits as its factorization.

22993393 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 22993393 is about 4795.1426464705. The cubic root of 22993393 is about 284.3594643205.

The spelling of 22993393 in words is "twenty-two million, nine hundred ninety-three thousand, three hundred ninety-three".