1155420493 has 2 divisors, whose sum is σ = 1155420494. Its totient is φ = 1155420492.

The previous prime is 1155420443. The next prime is 1155420527. The reversal of 1155420493 is 3940245511.

It is an a-pointer prime, because the next prime (1155420527) can be obtained adding 1155420493 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 926715364 + 228705129 = 30442^2 + 15123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155420493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155420443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577710246 + 577710247.

It is an arithmetic number, because the mean of its divisors is an integer number (577710247).

Almost surely, 2^1155420493 is an apocalyptic number.

It is an amenable number.

1155420493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155420493 is an equidigital number, since it uses as much as digits as its factorization.

1155420493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1155420493 is about 33991.4767699198. The cubic root of 1155420493 is about 1049.3330588492. Note that the first 3 decimals are identical.

The spelling of 1155420493 in words is "one billion, one hundred fifty-five million, four hundred twenty thousand, four hundred ninety-three".