130077721 has 8 divisors (see below), whose sum is σ = 131060160. Its totient is φ = 129098928.

The previous prime is 130077697. The next prime is 130077733. The reversal of 130077721 is 127770031.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130077721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130077721.

It is not an unprimeable number, because it can be changed into a prime (130077821) 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, 154620 + ... + 155458.

It is an arithmetic number, because the mean of its divisors is an integer number (16382520).

Almost surely, 2^130077721 is an apocalyptic number.

It is an amenable number.

130077721 is a deficient number, since it is larger than the sum of its proper divisors (982439).

130077721 is an equidigital number, since it uses as much as digits as its factorization.

130077721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 130077721 is about 11405.1620330445. The cubic root of 130077721 is about 506.6806353393.

The spelling of 130077721 in words is "one hundred thirty million, seventy-seven thousand, seven hundred twenty-one".