42847669 has 2 divisors, whose sum is σ = 42847670. Its totient is φ = 42847668.

The previous prime is 42847663. The next prime is 42847711. The reversal of 42847669 is 96674824.

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., 28483569 + 14364100 = 5337^2 + 3790^2 .

It is a cyclic number.

It is not a de Polignac number, because 42847669 - 2³ = 42847661 is a prime.

It is a super-2 number, since 2×42847669² = 3671845477467122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42847661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21423834 + 21423835.

It is an arithmetic number, because the mean of its divisors is an integer number (21423835).

Almost surely, 2^42847669 is an apocalyptic number.

It is an amenable number.

42847669 is a deficient number, since it is larger than the sum of its proper divisors (1).

42847669 is an equidigital number, since it uses as much as digits as its factorization.

42847669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 46.

The square root of 42847669 is about 6545.8130892961. The cubic root of 42847669 is about 349.9256141238.

The spelling of 42847669 in words is "forty-two million, eight hundred forty-seven thousand, six hundred sixty-nine".