40369523 has 2 divisors, whose sum is σ = 40369524. Its totient is φ = 40369522.

The previous prime is 40369519. The next prime is 40369541. The reversal of 40369523 is 32596304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40369523 - 2² = 40369519 is a prime.

It is a Sophie Germain prime.

It is equal to p_2454818 and since 40369523 and 2454818 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40369523.

It is not a weakly prime, because it can be changed into another prime (40369513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20184761 + 20184762.

It is an arithmetic number, because the mean of its divisors is an integer number (20184762).

Almost surely, 2^40369523 is an apocalyptic number.

40369523 is a deficient number, since it is larger than the sum of its proper divisors (1).

40369523 is an equidigital number, since it uses as much as digits as its factorization.

40369523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 40369523 is about 6353.7015195868. The cubic root of 40369523 is about 343.0450886619.

The spelling of 40369523 in words is "forty million, three hundred sixty-nine thousand, five hundred twenty-three".