42758399 has 2 divisors, whose sum is σ = 42758400. Its totient is φ = 42758398.

The previous prime is 42758351. The next prime is 42758407. The reversal of 42758399 is 99385724.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42758399 - 2⁸ = 42758143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42758329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21379199 + 21379200.

It is an arithmetic number, because the mean of its divisors is an integer number (21379200).

Almost surely, 2^42758399 is an apocalyptic number.

42758399 is a deficient number, since it is larger than the sum of its proper divisors (1).

42758399 is an equidigital number, since it uses as much as digits as its factorization.

42758399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 42758399 is about 6538.9906713498. The cubic root of 42758399 is about 349.6824303102.

The spelling of 42758399 in words is "forty-two million, seven hundred fifty-eight thousand, three hundred ninety-nine".