916855477 has 4 divisors (see below), whose sum is σ = 925933356. Its totient is φ = 907777600.

The previous prime is 916855421. The next prime is 916855487. The reversal of 916855477 is 774558619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 774558619 = 911 ⋅850229.

It can be written as a sum of positive squares in 2 ways, for example, as 878588881 + 38266596 = 29641^2 + 6186^2 .

It is a cyclic number.

It is not a de Polignac number, because 916855477 - 2¹¹ = 916853429 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 (916855487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4538788 + ... + 4538989.

It is an arithmetic number, because the mean of its divisors is an integer number (231483339).

Almost surely, 2^916855477 is an apocalyptic number.

It is an amenable number.

916855477 is a deficient number, since it is larger than the sum of its proper divisors (9077879).

916855477 is a wasteful number, since it uses less digits than its factorization.

916855477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9077878.

The product of its digits is 2116800, while the sum is 52.

The square root of 916855477 is about 30279.6214804611. The cubic root of 916855477 is about 971.4794715163.

The spelling of 916855477 in words is "nine hundred sixteen million, eight hundred fifty-five thousand, four hundred seventy-seven".