1453640893 has 2 divisors, whose sum is σ = 1453640894. Its totient is φ = 1453640892.

The previous prime is 1453640869. The next prime is 1453640899. The reversal of 1453640893 is 3980463541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 872493444 + 581147449 = 29538^2 + 24107^2 .

It is a cyclic number.

It is not a de Polignac number, because 1453640893 - 2²⁵ = 1420086461 is a prime.

It is a super-2 number, since 2×1453640893² = 4226143691603674898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1453640899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 726820446 + 726820447.

It is an arithmetic number, because the mean of its divisors is an integer number (726820447).

Almost surely, 2^1453640893 is an apocalyptic number.

It is an amenable number.

1453640893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1453640893 is an equidigital number, since it uses as much as digits as its factorization.

1453640893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 1453640893 is about 38126.6428236214. The cubic root of 1453640893 is about 1132.7977487720.

The spelling of 1453640893 in words is "one billion, four hundred fifty-three million, six hundred forty thousand, eight hundred ninety-three".