42799807 has 2 divisors, whose sum is σ = 42799808. Its totient is φ = 42799806.

The previous prime is 42799793. The next prime is 42799811. The reversal of 42799807 is 70899724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42799807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42799817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21399903 + 21399904.

It is an arithmetic number, because the mean of its divisors is an integer number (21399904).

Almost surely, 2^42799807 is an apocalyptic number.

42799807 is a deficient number, since it is larger than the sum of its proper divisors (1).

42799807 is an equidigital number, since it uses as much as digits as its factorization.

42799807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 42799807 is about 6542.1561430464. The cubic root of 42799807 is about 349.7952734693.

The spelling of 42799807 in words is "forty-two million, seven hundred ninety-nine thousand, eight hundred seven".