17949929 has 2 divisors, whose sum is σ = 17949930. Its totient is φ = 17949928.

The previous prime is 17949907. The next prime is 17949931. The reversal of 17949929 is 92994971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15389929 + 2560000 = 3923^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 17949929 - 2²⁴ = 1172713 is a prime.

It is a super-2 number, since 2×17949929² = 644399902210082, which contains 22 as substring.

Together with 17949931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (17949949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8974964 + 8974965.

It is an arithmetic number, because the mean of its divisors is an integer number (8974965).

Almost surely, 2^17949929 is an apocalyptic number.

It is an amenable number.

17949929 is a deficient number, since it is larger than the sum of its proper divisors (1).

17949929 is an equidigital number, since it uses as much as digits as its factorization.

17949929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 50.

The square root of 17949929 is about 4236.7356537787. The cubic root of 17949929 is about 261.8309079280.

The spelling of 17949929 in words is "seventeen million, nine hundred forty-nine thousand, nine hundred twenty-nine".