42431093 has 2 divisors, whose sum is σ = 42431094. Its totient is φ = 42431092.

The previous prime is 42431087. The next prime is 42431101. The reversal of 42431093 is 39013424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33443089 + 8988004 = 5783^2 + 2998^2 .

It is a cyclic number.

It is not a de Polignac number, because 42431093 - 2¹⁴ = 42414709 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42431003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21215546 + 21215547.

It is an arithmetic number, because the mean of its divisors is an integer number (21215547).

Almost surely, 2^42431093 is an apocalyptic number.

It is an amenable number.

42431093 is a deficient number, since it is larger than the sum of its proper divisors (1).

42431093 is an equidigital number, since it uses as much as digits as its factorization.

42431093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 42431093 is about 6513.9153356488. The cubic root of 42431093 is about 348.7878969451.

The spelling of 42431093 in words is "forty-two million, four hundred thirty-one thousand, ninety-three".