917112749 has 4 divisors (see below), whose sum is σ = 1048128864. Its totient is φ = 786096636.

The previous prime is 917112743. The next prime is 917112799. The reversal of 917112749 is 947211719.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 947211719 = 73 ⋅12975503.

It is a cyclic number.

It is not a de Polignac number, because 917112749 - 2¹² = 917108653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (917112743) 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, 65508047 + ... + 65508060.

It is an arithmetic number, because the mean of its divisors is an integer number (262032216).

Almost surely, 2^917112749 is an apocalyptic number.

It is an amenable number.

917112749 is a deficient number, since it is larger than the sum of its proper divisors (131016115).

917112749 is a wasteful number, since it uses less digits than its factorization.

917112749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131016114.

The product of its digits is 31752, while the sum is 41.

The square root of 917112749 is about 30283.8694522348. The cubic root of 917112749 is about 971.5703295628.

The spelling of 917112749 in words is "nine hundred seventeen million, one hundred twelve thousand, seven hundred forty-nine".