916130821 has 8 divisors (see below), whose sum is σ = 935280000. Its totient is φ = 897155280.

The previous prime is 916130807. The next prime is 916130827. The reversal of 916130821 is 128031619.

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 916130821 - 2¹³ = 916122629 is a prime.

It is a super-2 number, since 2×916130821² = 1678591362372268082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916130827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32721 + ... + 53878.

It is an arithmetic number, because the mean of its divisors is an integer number (116910000).

Almost surely, 2^916130821 is an apocalyptic number.

It is an amenable number.

916130821 is a deficient number, since it is larger than the sum of its proper divisors (19149179).

916130821 is a wasteful number, since it uses less digits than its factorization.

916130821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86819.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 916130821 is about 30267.6530474366. The cubic root of 916130821 is about 971.2234609825.

The spelling of 916130821 in words is "nine hundred sixteen million, one hundred thirty thousand, eight hundred twenty-one".