40506859 has 2 divisors, whose sum is σ = 40506860. Its totient is φ = 40506858.

The previous prime is 40506857. The next prime is 40506871. The reversal of 40506859 is 95860504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40506859 - 2¹ = 40506857 is a prime.

It is a super-3 number, since 3×40506859³ (a number of 24 digits) contains 333 as substring.

Together with 40506857, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40506853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20253429 + 20253430.

It is an arithmetic number, because the mean of its divisors is an integer number (20253430).

Almost surely, 2^40506859 is an apocalyptic number.

40506859 is a deficient number, since it is larger than the sum of its proper divisors (1).

40506859 is an equidigital number, since it uses as much as digits as its factorization.

40506859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 40506859 is about 6364.4999017990. The cubic root of 40506859 is about 343.4336583260.

The spelling of 40506859 in words is "forty million, five hundred six thousand, eight hundred fifty-nine".