916809645 has 8 divisors (see below), whose sum is σ = 1466895456. Its totient is φ = 488965136.

The previous prime is 916809631. The next prime is 916809659. The reversal of 916809645 is 546908619.

It is an interprime number because it is at equal distance from previous prime (916809631) and next prime (916809659).

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 916809645 - 2⁴ = 916809629 is a prime.

It is a super-3 number, since 3×916809645³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 916809594 and 916809603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30560307 + ... + 30560336.

It is an arithmetic number, because the mean of its divisors is an integer number (183361932).

Almost surely, 2^916809645 is an apocalyptic number.

It is an amenable number.

916809645 is a deficient number, since it is larger than the sum of its proper divisors (550085811).

916809645 is a wasteful number, since it uses less digits than its factorization.

916809645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61120651.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 916809645 is about 30278.8646583719. The cubic root of 916809645 is about 971.4632837273.

The spelling of 916809645 in words is "nine hundred sixteen million, eight hundred nine thousand, six hundred forty-five".