1153981079 has 4 divisors (see below), whose sum is σ = 1193773560. Its totient is φ = 1114188600.

The previous prime is 1153981051. The next prime is 1153981099. The reversal of 1153981079 is 9701893511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9701893511 = 23 ⋅421821457.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1153981079 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 (1153981099) 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, 19896197 + ... + 19896254.

It is an arithmetic number, because the mean of its divisors is an integer number (298443390).

Almost surely, 2^1153981079 is an apocalyptic number.

1153981079 is a deficient number, since it is larger than the sum of its proper divisors (39792481).

1153981079 is an equidigital number, since it uses as much as digits as its factorization.

1153981079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39792480.

The product of its (nonzero) digits is 68040, while the sum is 44.

The square root of 1153981079 is about 33970.2970107710. The cubic root of 1153981079 is about 1048.8971274100.

The spelling of 1153981079 in words is "one billion, one hundred fifty-three million, nine hundred eighty-one thousand, seventy-nine".