42927769 has 2 divisors, whose sum is σ = 42927770. Its totient is φ = 42927768.

The previous prime is 42927767. The next prime is 42927817. The reversal of 42927769 is 96772924.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38601369 + 4326400 = 6213^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 42927769 - 2¹ = 42927767 is a prime.

It is a super-2 number, since 2×42927769² = 3685586702634722, which contains 22 as substring.

Together with 42927767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42927763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21463884 + 21463885.

It is an arithmetic number, because the mean of its divisors is an integer number (21463885).

Almost surely, 2^42927769 is an apocalyptic number.

It is an amenable number.

42927769 is a deficient number, since it is larger than the sum of its proper divisors (1).

42927769 is an equidigital number, since it uses as much as digits as its factorization.

42927769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The square root of 42927769 is about 6551.9286473526. The cubic root of 42927769 is about 350.1435302478.

The spelling of 42927769 in words is "forty-two million, nine hundred twenty-seven thousand, seven hundred sixty-nine".