22749497 has 2 divisors, whose sum is σ = 22749498. Its totient is φ = 22749496.

The previous prime is 22749491. The next prime is 22749511. The reversal of 22749497 is 79494722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11587216 + 11162281 = 3404^2 + 3341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22749497 is a prime.

It is a super-2 number, since 2×22749497² = 1035079227506018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22749491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11374748 + 11374749.

It is an arithmetic number, because the mean of its divisors is an integer number (11374749).

Almost surely, 2^22749497 is an apocalyptic number.

It is an amenable number.

22749497 is a deficient number, since it is larger than the sum of its proper divisors (1).

22749497 is an equidigital number, since it uses as much as digits as its factorization.

22749497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 22749497 is about 4769.6432780660. The cubic root of 22749497 is about 283.3504670915.

The spelling of 22749497 in words is "twenty-two million, seven hundred forty-nine thousand, four hundred ninety-seven".