1151954509 has 2 divisors, whose sum is σ = 1151954510. Its totient is φ = 1151954508.

The previous prime is 1151954473. The next prime is 1151954519. The reversal of 1151954509 is 9054591511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 772562025 + 379392484 = 27795^2 + 19478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151954509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151954519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575977254 + 575977255.

It is an arithmetic number, because the mean of its divisors is an integer number (575977255).

Almost surely, 2^1151954509 is an apocalyptic number.

It is an amenable number.

1151954509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151954509 is an equidigital number, since it uses as much as digits as its factorization.

1151954509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 40.

The square root of 1151954509 is about 33940.4553446179. The cubic root of 1151954509 is about 1048.2827588738.

The spelling of 1151954509 in words is "one billion, one hundred fifty-one million, nine hundred fifty-four thousand, five hundred nine".