22378723 has 2 divisors, whose sum is σ = 22378724. Its totient is φ = 22378722.

The previous prime is 22378717. The next prime is 22378771. The reversal of 22378723 is 32787322.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22378723 - 2¹³ = 22370531 is a prime.

It is a super-2 number, since 2×22378723² = 1001614486221458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22378423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11189361 + 11189362.

It is an arithmetic number, because the mean of its divisors is an integer number (11189362).

Almost surely, 2^22378723 is an apocalyptic number.

22378723 is a deficient number, since it is larger than the sum of its proper divisors (1).

22378723 is an equidigital number, since it uses as much as digits as its factorization.

22378723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 34.

The square root of 22378723 is about 4730.6154990656. The cubic root of 22378723 is about 281.8026678087.

The spelling of 22378723 in words is "twenty-two million, three hundred seventy-eight thousand, seven hundred twenty-three".