42886997 has 2 divisors, whose sum is σ = 42886998. Its totient is φ = 42886996.

The previous prime is 42886993. The next prime is 42886999. The reversal of 42886997 is 79968824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41075281 + 1811716 = 6409^2 + 1346^2 .

It is a cyclic number.

It is not a de Polignac number, because 42886997 - 2² = 42886993 is a prime.

Together with 42886999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42886993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21443498 + 21443499.

It is an arithmetic number, because the mean of its divisors is an integer number (21443499).

Almost surely, 2^42886997 is an apocalyptic number.

It is an amenable number.

42886997 is a deficient number, since it is larger than the sum of its proper divisors (1).

42886997 is an equidigital number, since it uses as much as digits as its factorization.

42886997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The square root of 42886997 is about 6548.8164579564. The cubic root of 42886997 is about 350.0326418536.

The spelling of 42886997 in words is "forty-two million, eight hundred eighty-six thousand, nine hundred ninety-seven".