1145213663 has 4 divisors (see below), whose sum is σ = 1249324008. Its totient is φ = 1041103320.

The previous prime is 1145213639. The next prime is 1145213669. The reversal of 1145213663 is 3663125411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3663125411 = 11 ⋅333011401.

It is a cyclic number.

It is not a de Polignac number, because 1145213663 - 2²⁸ = 876778207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145213669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52055156 + ... + 52055177.

It is an arithmetic number, because the mean of its divisors is an integer number (312331002).

Almost surely, 2^1145213663 is an apocalyptic number.

1145213663 is a deficient number, since it is larger than the sum of its proper divisors (104110345).

1145213663 is a wasteful number, since it uses less digits than its factorization.

1145213663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104110344.

The product of its digits is 12960, while the sum is 32.

The square root of 1145213663 is about 33841.0056440408. The cubic root of 1145213663 is about 1046.2340261071.

The spelling of 1145213663 in words is "one billion, one hundred forty-five million, two hundred thirteen thousand, six hundred sixty-three".