1165454399 has 2 divisors, whose sum is σ = 1165454400. Its totient is φ = 1165454398.

The previous prime is 1165454383. The next prime is 1165454429. The reversal of 1165454399 is 9934545611.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1165454399 - 2⁴ = 1165454383 is a prime.

It is a super-2 number, since 2×1165454399² = 2716567912296902402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165454599) 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, 582727199 + 582727200.

It is an arithmetic number, because the mean of its divisors is an integer number (582727200).

Almost surely, 2^1165454399 is an apocalyptic number.

1165454399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165454399 is an equidigital number, since it uses as much as digits as its factorization.

1165454399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 47.

The square root of 1165454399 is about 34138.7521593863. The cubic root of 1165454399 is about 1052.3618485532.

The spelling of 1165454399 in words is "one billion, one hundred sixty-five million, four hundred fifty-four thousand, three hundred ninety-nine".