1153078997 has 4 divisors (see below), whose sum is σ = 1317804576. Its totient is φ = 988353420.

The previous prime is 1153078963. The next prime is 1153078999. The reversal of 1153078997 is 7998703511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1153078997 - 2⁶ = 1153078933 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 (1153078999) 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, 82362779 + ... + 82362792.

It is an arithmetic number, because the mean of its divisors is an integer number (329451144).

Almost surely, 2^1153078997 is an apocalyptic number.

It is an amenable number.

1153078997 is a deficient number, since it is larger than the sum of its proper divisors (164725579).

1153078997 is an equidigital number, since it uses as much as digits as its factorization.

1153078997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164725578.

The product of its (nonzero) digits is 476280, while the sum is 50.

The square root of 1153078997 is about 33957.0169037270. The cubic root of 1153078997 is about 1048.6237439918.

The spelling of 1153078997 in words is "one billion, one hundred fifty-three million, seventy-eight thousand, nine hundred ninety-seven".