1157993647 has 2 divisors, whose sum is σ = 1157993648. Its totient is φ = 1157993646.

The previous prime is 1157993633. The next prime is 1157993653. The reversal of 1157993647 is 7463997511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157993647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1157993594 and 1157993603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157993657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578996823 + 578996824.

It is an arithmetic number, because the mean of its divisors is an integer number (578996824).

Almost surely, 2^1157993647 is an apocalyptic number.

1157993647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157993647 is an equidigital number, since it uses as much as digits as its factorization.

1157993647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 52.

The square root of 1157993647 is about 34029.3057084625. The cubic root of 1157993647 is about 1050.1114460695. Note that the first 3 decimals are identical.

The spelling of 1157993647 in words is "one billion, one hundred fifty-seven million, nine hundred ninety-three thousand, six hundred forty-seven".