1164353521 has 4 divisors (see below), whose sum is σ = 1201913344. Its totient is φ = 1126793700.

The previous prime is 1164353501. The next prime is 1164353539. The reversal of 1164353521 is 1253534611.

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.

It is a cyclic number.

It is not a de Polignac number, because 1164353521 - 2⁹ = 1164353009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 37559791 = 1164353521 / (1 + 1 + 6 + 4 + 3 + 5 + 3 + 5 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1164353501) 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, 18779865 + ... + 18779926.

It is an arithmetic number, because the mean of its divisors is an integer number (300478336).

Almost surely, 2^1164353521 is an apocalyptic number.

It is an amenable number.

1164353521 is a deficient number, since it is larger than the sum of its proper divisors (37559823).

1164353521 is an equidigital number, since it uses as much as digits as its factorization.

1164353521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37559822.

The product of its digits is 10800, while the sum is 31.

The square root of 1164353521 is about 34122.6247671541. The cubic root of 1164353521 is about 1052.0303935785.

The spelling of 1164353521 in words is "one billion, one hundred sixty-four million, three hundred fifty-three thousand, five hundred twenty-one".