916545421 has 8 divisors (see below), whose sum is σ = 1001650464. Its totient is φ = 831737520.

The previous prime is 916545419. The next prime is 916545431. The reversal of 916545421 is 124545619.

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 916545421 - 2¹ = 916545419 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 (916545431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67806 + ... + 80191.

It is an arithmetic number, because the mean of its divisors is an integer number (125206308).

Almost surely, 2^916545421 is an apocalyptic number.

It is an amenable number.

916545421 is a deficient number, since it is larger than the sum of its proper divisors (85105043).

916545421 is a wasteful number, since it uses less digits than its factorization.

916545421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148571.

The product of its digits is 43200, while the sum is 37.

The square root of 916545421 is about 30274.5011684751. The cubic root of 916545421 is about 971.3699497116.

The spelling of 916545421 in words is "nine hundred sixteen million, five hundred forty-five thousand, four hundred twenty-one".