916780901 has 4 divisors (see below), whose sum is σ = 927081900. Its totient is φ = 906479904.

The previous prime is 916780883. The next prime is 916780903. The reversal of 916780901 is 109087619.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109087619 = 839 ⋅130021.

It can be written as a sum of positive squares in 2 ways, for example, as 379236676 + 537544225 = 19474^2 + 23185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-916780901 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 (916780903) 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, 5150366 + ... + 5150543.

It is an arithmetic number, because the mean of its divisors is an integer number (231770475).

Almost surely, 2^916780901 is an apocalyptic number.

It is an amenable number.

916780901 is a deficient number, since it is larger than the sum of its proper divisors (10300999).

916780901 is a wasteful number, since it uses less digits than its factorization.

916780901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10300998.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 916780901 is about 30278.3900001305. The cubic root of 916780901 is about 971.4531311172.

The spelling of 916780901 in words is "nine hundred sixteen million, seven hundred eighty thousand, nine hundred one".