42283991 has 2 divisors, whose sum is σ = 42283992. Its totient is φ = 42283990.

The previous prime is 42283961. The next prime is 42284017. The reversal of 42283991 is 19938224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42283991 - 2¹⁰ = 42282967 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42283931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21141995 + 21141996.

It is an arithmetic number, because the mean of its divisors is an integer number (21141996).

Almost surely, 2^42283991 is an apocalyptic number.

42283991 is a deficient number, since it is larger than the sum of its proper divisors (1).

42283991 is an equidigital number, since it uses as much as digits as its factorization.

42283991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 42283991 is about 6502.6141666256. The cubic root of 42283991 is about 348.3843657950.

The spelling of 42283991 in words is "forty-two million, two hundred eighty-three thousand, nine hundred ninety-one".