24791989 has 2 divisors, whose sum is σ = 24791990. Its totient is φ = 24791988.

The previous prime is 24791981. The next prime is 24792029. The reversal of 24791989 is 98919742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22043025 + 2748964 = 4695^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 24791989 - 2³ = 24791981 is a prime.

It is a super-2 number, since 2×24791989² = 1229285437152242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24791981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12395994 + 12395995.

It is an arithmetic number, because the mean of its divisors is an integer number (12395995).

Almost surely, 2^24791989 is an apocalyptic number.

It is an amenable number.

24791989 is a deficient number, since it is larger than the sum of its proper divisors (1).

24791989 is an equidigital number, since it uses as much as digits as its factorization.

24791989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 24791989 is about 4979.1554504755. The cubic root of 24791989 is about 291.5885436843.

The spelling of 24791989 in words is "twenty-four million, seven hundred ninety-one thousand, nine hundred eighty-nine".