16400453 has 2 divisors, whose sum is σ = 16400454. Its totient is φ = 16400452.

The previous prime is 16400441. The next prime is 16400459. The reversal of 16400453 is 35400461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8655364 + 7745089 = 2942^2 + 2783^2 .

It is an emirp because it is prime and its reverse (35400461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16400453 - 2⁶ = 16400389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16400459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200226 + 8200227.

It is an arithmetic number, because the mean of its divisors is an integer number (8200227).

Almost surely, 2^16400453 is an apocalyptic number.

It is an amenable number.

16400453 is a deficient number, since it is larger than the sum of its proper divisors (1).

16400453 is an equidigital number, since it uses as much as digits as its factorization.

16400453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 16400453 is about 4049.7472760655. The cubic root of 16400453 is about 254.0691578067.

The spelling of 16400453 in words is "sixteen million, four hundred thousand, four hundred fifty-three".