1148971657 has 4 divisors (see below), whose sum is σ = 1160347716. Its totient is φ = 1137595600.

The previous prime is 1148971651. The next prime is 1148971679. The reversal of 1148971657 is 7561798411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 792366201 + 356605456 = 28149^2 + 18884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1148971657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1148971657.

It is not an unprimeable number, because it can be changed into a prime (1148971651) 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, 5687878 + ... + 5688079.

It is an arithmetic number, because the mean of its divisors is an integer number (290086929).

Almost surely, 2^1148971657 is an apocalyptic number.

It is an amenable number.

1148971657 is a deficient number, since it is larger than the sum of its proper divisors (11376059).

1148971657 is a wasteful number, since it uses less digits than its factorization.

1148971657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11376058.

The product of its digits is 423360, while the sum is 49.

The square root of 1148971657 is about 33896.4844342300. The cubic root of 1148971657 is about 1047.3771747617.

The spelling of 1148971657 in words is "one billion, one hundred forty-eight million, nine hundred seventy-one thousand, six hundred fifty-seven".