42770687 has 2 divisors, whose sum is σ = 42770688. Its totient is φ = 42770686.

The previous prime is 42770677. The next prime is 42770701. The reversal of 42770687 is 78607724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42770687 - 2⁴ = 42770671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42770677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21385343 + 21385344.

It is an arithmetic number, because the mean of its divisors is an integer number (21385344).

Almost surely, 2^42770687 is an apocalyptic number.

42770687 is a deficient number, since it is larger than the sum of its proper divisors (1).

42770687 is an equidigital number, since it uses as much as digits as its factorization.

42770687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 42770687 is about 6539.9301984043. The cubic root of 42770687 is about 349.7159245963.

The spelling of 42770687 in words is "forty-two million, seven hundred seventy thousand, six hundred eighty-seven".