23129779 has 2 divisors, whose sum is σ = 23129780. Its totient is φ = 23129778.

The previous prime is 23129767. The next prime is 23129803. The reversal of 23129779 is 97792132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23129779 - 2¹⁷ = 22998707 is a prime.

It is a super-3 number, since 3×23129779³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (23129759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11564889 + 11564890.

It is an arithmetic number, because the mean of its divisors is an integer number (11564890).

Almost surely, 2^23129779 is an apocalyptic number.

23129779 is a deficient number, since it is larger than the sum of its proper divisors (1).

23129779 is an equidigital number, since it uses as much as digits as its factorization.

23129779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 23129779 is about 4809.3428865075. The cubic root of 23129779 is about 284.9205852396.

The spelling of 23129779 in words is "twenty-three million, one hundred twenty-nine thousand, seven hundred seventy-nine".