1163021953 has 4 divisors (see below), whose sum is σ = 1163090368. Its totient is φ = 1162953540.

The previous prime is 1163021929. The next prime is 1163021987. The reversal of 1163021953 is 3591203611.

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.

It is a cyclic number.

It is not a de Polignac number, because 1163021953 - 2⁵ = 1163021921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163021053) 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, 13108 + ... + 49978.

It is an arithmetic number, because the mean of its divisors is an integer number (290772592).

Almost surely, 2^1163021953 is an apocalyptic number.

It is an amenable number.

1163021953 is a deficient number, since it is larger than the sum of its proper divisors (68415).

1163021953 is an equidigital number, since it uses as much as digits as its factorization.

1163021953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68414.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 1163021953 is about 34103.1076736417. The cubic root of 1163021953 is about 1051.6292026083.

The spelling of 1163021953 in words is "one billion, one hundred sixty-three million, twenty-one thousand, nine hundred fifty-three".