400036523 has 2 divisors, whose sum is σ = 400036524. Its totient is φ = 400036522.

The previous prime is 400036519. The next prime is 400036547. The reversal of 400036523 is 325630004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400036523 - 2² = 400036519 is a prime.

It is not a weakly prime, because it can be changed into another prime (400036573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200018261 + 200018262.

It is an arithmetic number, because the mean of its divisors is an integer number (200018262).

Almost surely, 2^400036523 is an apocalyptic number.

400036523 is a deficient number, since it is larger than the sum of its proper divisors (1).

400036523 is an equidigital number, since it uses as much as digits as its factorization.

400036523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 400036523 is about 20000.9130541583. The cubic root of 400036523 is about 736.8287243593.

Adding to 400036523 its reverse (325630004), we get a palindrome (725666527).

The spelling of 400036523 in words is "four hundred million, thirty-six thousand, five hundred twenty-three".