1152809279 has 4 divisors (see below), whose sum is σ = 1177337184. Its totient is φ = 1128281376.

The previous prime is 1152809267. The next prime is 1152809291. The reversal of 1152809279 is 9729082511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9729082511 = 13537 ⋅718703.

It is an interprime number because it is at equal distance from previous prime (1152809267) and next prime (1152809291).

It is a cyclic number.

It is not a de Polignac number, because 1152809279 - 2²⁴ = 1136032063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152809209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12263882 + ... + 12263975.

It is an arithmetic number, because the mean of its divisors is an integer number (294334296).

Almost surely, 2^1152809279 is an apocalyptic number.

1152809279 is a deficient number, since it is larger than the sum of its proper divisors (24527905).

1152809279 is an equidigital number, since it uses as much as digits as its factorization.

1152809279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24527904.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1152809279 is about 33953.0452095243. The cubic root of 1152809279 is about 1048.5419760311.

The spelling of 1152809279 in words is "one billion, one hundred fifty-two million, eight hundred nine thousand, two hundred seventy-nine".