40779331 has 2 divisors, whose sum is σ = 40779332. Its totient is φ = 40779330.

The previous prime is 40779329. The next prime is 40779367. The reversal of 40779331 is 13397704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40779331 - 2¹ = 40779329 is a prime.

It is a super-2 number, since 2×40779331² = 3325907673615122, which contains 22 as substring.

Together with 40779329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40779031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20389665 + 20389666.

It is an arithmetic number, because the mean of its divisors is an integer number (20389666).

Almost surely, 2^40779331 is an apocalyptic number.

40779331 is a deficient number, since it is larger than the sum of its proper divisors (1).

40779331 is an equidigital number, since it uses as much as digits as its factorization.

40779331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 40779331 is about 6385.8696353747. The cubic root of 40779331 is about 344.2019810538.

The spelling of 40779331 in words is "forty million, seven hundred seventy-nine thousand, three hundred thirty-one".