1197945656 has 8 divisors (see below), whose sum is σ = 2246148120. Its totient is φ = 598972824.

The previous prime is 1197945631. The next prime is 1197945677. The reversal of 1197945656 is 6565497911.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1197945598 and 1197945607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74871596 + ... + 74871611.

It is an arithmetic number, because the mean of its divisors is an integer number (280768515).

Almost surely, 2^1197945656 is an apocalyptic number.

It is an amenable number.

1197945656 is a deficient number, since it is larger than the sum of its proper divisors (1048202464).

1197945656 is a wasteful number, since it uses less digits than its factorization.

1197945656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149743213 (or 149743209 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 53.

The square root of 1197945656 is about 34611.3515482999. The cubic root of 1197945656 is about 1062.0518155129.

The spelling of 1197945656 in words is "one billion, one hundred ninety-seven million, nine hundred forty-five thousand, six hundred fifty-six".