42697481837 has 2 divisors, whose sum is σ = 42697481838. Its totient is φ = 42697481836.

The previous prime is 42697481833. The next prime is 42697481839. The reversal of 42697481837 is 73818479624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36998137801 + 5699344036 = 192349^2 + 75494^2 .

It is a cyclic number.

It is not a de Polignac number, because 42697481837 - 2² = 42697481833 is a prime.

Together with 42697481839, 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 (42697481833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21348740918 + 21348740919.

It is an arithmetic number, because the mean of its divisors is an integer number (21348740919).

Almost surely, 2^42697481837 is an apocalyptic number.

It is an amenable number.

42697481837 is a deficient number, since it is larger than the sum of its proper divisors (1).

42697481837 is an equidigital number, since it uses as much as digits as its factorization.

42697481837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 59.

The spelling of 42697481837 in words is "forty-two billion, six hundred ninety-seven million, four hundred eighty-one thousand, eight hundred thirty-seven".