42787597 has 2 divisors, whose sum is σ = 42787598. Its totient is φ = 42787596.

The previous prime is 42787583. The next prime is 42787603. The reversal of 42787597 is 79578724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42784681 + 2916 = 6541^2 + 54^2 .

It is a cyclic number.

It is not a de Polignac number, because 42787597 - 2²³ = 34398989 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42787597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42787517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21393798 + 21393799.

It is an arithmetic number, because the mean of its divisors is an integer number (21393799).

Almost surely, 2^42787597 is an apocalyptic number.

It is an amenable number.

42787597 is a deficient number, since it is larger than the sum of its proper divisors (1).

42787597 is an equidigital number, since it uses as much as digits as its factorization.

42787597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 49.

The square root of 42787597 is about 6541.2228978991. Note that the first 3 decimals coincide. The cubic root of 42787597 is about 349.7620069136.

The spelling of 42787597 in words is "forty-two million, seven hundred eighty-seven thousand, five hundred ninety-seven".