1172660647 has 4 divisors (see below), whose sum is σ = 1204354216. Its totient is φ = 1140967080.

The previous prime is 1172660641. The next prime is 1172660651. The reversal of 1172660647 is 7460662711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7460662711 = 181 ⋅41219131.

It is a cyclic number.

It is not a de Polignac number, because 1172660647 - 2¹⁵ = 1172627879 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 (1172660641) 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, 15846729 + ... + 15846802.

It is an arithmetic number, because the mean of its divisors is an integer number (301088554).

Almost surely, 2^1172660647 is an apocalyptic number.

1172660647 is a deficient number, since it is larger than the sum of its proper divisors (31693569).

1172660647 is an equidigital number, since it uses as much as digits as its factorization.

1172660647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31693568.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 1172660647 is about 34244.1330303455. The cubic root of 1172660647 is about 1054.5263844507.

The spelling of 1172660647 in words is "one billion, one hundred seventy-two million, six hundred sixty thousand, six hundred forty-seven".