1153363921 has 2 divisors, whose sum is σ = 1153363922. Its totient is φ = 1153363920.

The previous prime is 1153363909. The next prime is 1153363943. The reversal of 1153363921 is 1293633511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1153349521 + 14400 = 33961^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153363921 - 2²¹ = 1151266769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1153364921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576681960 + 576681961.

It is an arithmetic number, because the mean of its divisors is an integer number (576681961).

Almost surely, 2^1153363921 is an apocalyptic number.

It is an amenable number.

1153363921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153363921 is an equidigital number, since it uses as much as digits as its factorization.

1153363921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 34.

The square root of 1153363921 is about 33961.2120072297. The cubic root of 1153363921 is about 1048.7101079693.

The spelling of 1153363921 in words is "one billion, one hundred fifty-three million, three hundred sixty-three thousand, nine hundred twenty-one".