1168740721 has 8 divisors (see below), whose sum is σ = 1172266560. Its totient is φ = 1165221552.

The previous prime is 1168740611. The next prime is 1168740739. The reversal of 1168740721 is 1270478611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1168740721 - 2¹³ = 1168732529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1168740761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756676 + ... + 758218.

It is an arithmetic number, because the mean of its divisors is an integer number (146533320).

Almost surely, 2^1168740721 is an apocalyptic number.

It is an amenable number.

1168740721 is a deficient number, since it is larger than the sum of its proper divisors (3525839).

1168740721 is a wasteful number, since it uses less digits than its factorization.

1168740721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 1168740721 is about 34186.8501181375. The cubic root of 1168740721 is about 1053.3500623467.

The spelling of 1168740721 in words is "one billion, one hundred sixty-eight million, seven hundred forty thousand, seven hundred twenty-one".