199240453 has 2 divisors, whose sum is σ = 199240454. Its totient is φ = 199240452.

The previous prime is 199240451. The next prime is 199240477. The reversal of 199240453 is 354042991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148303684 + 50936769 = 12178^2 + 7137^2 .

It is a cyclic number.

It is not a de Polignac number, because 199240453 - 2¹ = 199240451 is a prime.

It is a super-2 number, since 2×199240453² = 79393516223290418, which contains 22 as substring.

Together with 199240451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199240451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99620226 + 99620227.

It is an arithmetic number, because the mean of its divisors is an integer number (99620227).

Almost surely, 2^199240453 is an apocalyptic number.

It is an amenable number.

199240453 is a deficient number, since it is larger than the sum of its proper divisors (1).

199240453 is an equidigital number, since it uses as much as digits as its factorization.

199240453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 199240453 is about 14115.2560373519. The cubic root of 199240453 is about 584.0622988600.

The spelling of 199240453 in words is "one hundred ninety-nine million, two hundred forty thousand, four hundred fifty-three".