42989377 has 2 divisors, whose sum is σ = 42989378. Its totient is φ = 42989376.

The previous prime is 42989371. The next prime is 42989389. The reversal of 42989377 is 77398924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 4064256 = 6239^2 + 2016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42989377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42989377.

It is not a weakly prime, because it can be changed into another prime (42989371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21494688 + 21494689.

It is an arithmetic number, because the mean of its divisors is an integer number (21494689).

Almost surely, 2^42989377 is an apocalyptic number.

It is an amenable number.

42989377 is a deficient number, since it is larger than the sum of its proper divisors (1).

42989377 is an equidigital number, since it uses as much as digits as its factorization.

42989377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 42989377 is about 6556.6284781128. The cubic root of 42989377 is about 350.3109535869.

The spelling of 42989377 in words is "forty-two million, nine hundred eighty-nine thousand, three hundred seventy-seven".