40537579 has 2 divisors, whose sum is σ = 40537580. Its totient is φ = 40537578.

The previous prime is 40537577. The next prime is 40537589. The reversal of 40537579 is 97573504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40537579 - 2¹ = 40537577 is a prime.

It is a super-2 number, since 2×40537579² = 3286590622362482, which contains 22 as substring.

Together with 40537577, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40537577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20268789 + 20268790.

It is an arithmetic number, because the mean of its divisors is an integer number (20268790).

Almost surely, 2^40537579 is an apocalyptic number.

40537579 is a deficient number, since it is larger than the sum of its proper divisors (1).

40537579 is an equidigital number, since it uses as much as digits as its factorization.

40537579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 40537579 is about 6366.9128311922. The cubic root of 40537579 is about 343.5204552808.

The spelling of 40537579 in words is "forty million, five hundred thirty-seven thousand, five hundred seventy-nine".