1144189897 has 2 divisors, whose sum is σ = 1144189898. Its totient is φ = 1144189896.

The previous prime is 1144189859. The next prime is 1144189919. The reversal of 1144189897 is 7989814411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572932096 + 571257801 = 23936^2 + 23901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144189897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1144189807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572094948 + 572094949.

It is an arithmetic number, because the mean of its divisors is an integer number (572094949).

Almost surely, 2^1144189897 is an apocalyptic number.

It is an amenable number.

1144189897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144189897 is an equidigital number, since it uses as much as digits as its factorization.

1144189897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 52.

The square root of 1144189897 is about 33825.8761453417. The cubic root of 1144189897 is about 1045.9221721746.

The spelling of 1144189897 in words is "one billion, one hundred forty-four million, one hundred eighty-nine thousand, eight hundred ninety-seven".