40194523 has 2 divisors, whose sum is σ = 40194524. Its totient is φ = 40194522.

The previous prime is 40194499. The next prime is 40194529. The reversal of 40194523 is 32549104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40194523 - 2²⁵ = 6640091 is a prime.

It is equal to p_2444761 and since 40194523 and 2444761 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 40194491 and 40194500.

It is not a weakly prime, because it can be changed into another prime (40194529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20097261 + 20097262.

It is an arithmetic number, because the mean of its divisors is an integer number (20097262).

Almost surely, 2^40194523 is an apocalyptic number.

40194523 is a deficient number, since it is larger than the sum of its proper divisors (1).

40194523 is an equidigital number, since it uses as much as digits as its factorization.

40194523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40194523 is about 6339.9150625225. The cubic root of 40194523 is about 342.5486758389.

The spelling of 40194523 in words is "forty million, one hundred ninety-four thousand, five hundred twenty-three".