1197656817 has 16 divisors (see below), whose sum is σ = 1932354432. Its totient is φ = 644117760.

The previous prime is 1197656807. The next prime is 1197656833. The reversal of 1197656817 is 7186567911.

1197656817 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1197656817 - 2⁷ = 1197656689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 1197656817.

It is not an unprimeable number, because it can be changed into a prime (1197656807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1677034 + ... + 1677747.

It is an arithmetic number, because the mean of its divisors is an integer number (120772152).

Almost surely, 2^1197656817 is an apocalyptic number.

1197656817 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1197656817 is a deficient number, since it is larger than the sum of its proper divisors (734697615).

1197656817 is a wasteful number, since it uses less digits than its factorization.

1197656817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354808.

The product of its digits is 635040, while the sum is 51.

The square root of 1197656817 is about 34607.1786917108. The cubic root of 1197656817 is about 1061.9664508608.

The spelling of 1197656817 in words is "one billion, one hundred ninety-seven million, six hundred fifty-six thousand, eight hundred seventeen".