42772087 has 4 divisors (see below), whose sum is σ = 43358080. Its totient is φ = 42186096.

The previous prime is 42772039. The next prime is 42772091. The reversal of 42772087 is 78027724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42772087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42772787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292887 + ... + 293032.

It is an arithmetic number, because the mean of its divisors is an integer number (10839520).

Almost surely, 2^42772087 is an apocalyptic number.

42772087 is a deficient number, since it is larger than the sum of its proper divisors (585993).

42772087 is an equidigital number, since it uses as much as digits as its factorization.

42772087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585992.

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 42772087 is about 6540.0372323099. The cubic root of 42772087 is about 349.7197402700.

The spelling of 42772087 in words is "forty-two million, seven hundred seventy-two thousand, eighty-seven".