42436903 has 2 divisors, whose sum is σ = 42436904. Its totient is φ = 42436902.

The previous prime is 42436897. The next prime is 42436921. The reversal of 42436903 is 30963424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42436903 - 2¹⁷ = 42305831 is a prime.

It is equal to p_2572573 and since 42436903 and 2572573 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42436973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21218451 + 21218452.

It is an arithmetic number, because the mean of its divisors is an integer number (21218452).

Almost surely, 2^42436903 is an apocalyptic number.

42436903 is a deficient number, since it is larger than the sum of its proper divisors (1).

42436903 is an equidigital number, since it uses as much as digits as its factorization.

42436903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 42436903 is about 6514.3612887220. The cubic root of 42436903 is about 348.8038158153.

The spelling of 42436903 in words is "forty-two million, four hundred thirty-six thousand, nine hundred three".