42909499 has 2 divisors, whose sum is σ = 42909500. Its totient is φ = 42909498.

The previous prime is 42909469. The next prime is 42909511. The reversal of 42909499 is 99490924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42909499 - 2¹³ = 42901307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42909469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21454749 + 21454750.

It is an arithmetic number, because the mean of its divisors is an integer number (21454750).

Almost surely, 2^42909499 is an apocalyptic number.

42909499 is a deficient number, since it is larger than the sum of its proper divisors (1).

42909499 is an equidigital number, since it uses as much as digits as its factorization.

42909499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 42909499 is about 6550.5342530209. The cubic root of 42909499 is about 350.0938496627.

The spelling of 42909499 in words is "forty-two million, nine hundred nine thousand, four hundred ninety-nine".