42849977 has 2 divisors, whose sum is σ = 42849978. Its totient is φ = 42849976.

The previous prime is 42849949. The next prime is 42850001. The reversal of 42849977 is 77994824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29041321 + 13808656 = 5389^2 + 3716^2 .

It is a cyclic number.

It is not a de Polignac number, because 42849977 - 2⁸ = 42849721 is a prime.

It is a super-2 number, since 2×42849977² = 3672241057801058, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42849377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21424988 + 21424989.

It is an arithmetic number, because the mean of its divisors is an integer number (21424989).

Almost surely, 2^42849977 is an apocalyptic number.

It is an amenable number.

42849977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42849977 is an equidigital number, since it uses as much as digits as its factorization.

42849977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 50.

The square root of 42849977 is about 6545.9893828206. The cubic root of 42849977 is about 349.9318969534.

It can be divided in two parts, 428 and 49977, that added together give a palindrome (50405).

The spelling of 42849977 in words is "forty-two million, eight hundred forty-nine thousand, nine hundred seventy-seven".