1153964873 has 4 divisors (see below), whose sum is σ = 1154043408. Its totient is φ = 1153886340.

The previous prime is 1153964827. The next prime is 1153964909. The reversal of 1153964873 is 3784693511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3784693511 = 83 ⋅45598717.

It is a cyclic number.

It is not a de Polignac number, because 1153964873 - 2¹⁸ = 1153702729 is a prime.

It is a super-2 number, since 2×1153964873² = 2663269856235812258, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1153964173) 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, 9911 + ... + 49052.

It is an arithmetic number, because the mean of its divisors is an integer number (288510852).

Almost surely, 2^1153964873 is an apocalyptic number.

It is an amenable number.

1153964873 is a deficient number, since it is larger than the sum of its proper divisors (78535).

1153964873 is an equidigital number, since it uses as much as digits as its factorization.

1153964873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78534.

The product of its digits is 544320, while the sum is 47.

The square root of 1153964873 is about 33970.0584780186. The cubic root of 1153964873 is about 1048.8922173045.

The spelling of 1153964873 in words is "one billion, one hundred fifty-three million, nine hundred sixty-four thousand, eight hundred seventy-three".