845197749 has 24 divisors (see below), whose sum is σ = 1332755424. Its totient is φ = 511884000.

The previous prime is 845197747. The next prime is 845197783. The reversal of 845197749 is 947791548.

845197749 is a `hidden beast` number, since 84 + 519 + 7 + 7 + 49 = 666.

It is not a de Polignac number, because 845197749 - 2¹ = 845197747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 845197695 and 845197704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845197747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236919 + ... + 240459.

It is an arithmetic number, because the mean of its divisors is an integer number (55531476).

Almost surely, 2^845197749 is an apocalyptic number.

It is an amenable number.

845197749 is a deficient number, since it is larger than the sum of its proper divisors (487557675).

845197749 is a wasteful number, since it uses less digits than its factorization.

845197749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969 (or 5966 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 845197749 is about 29072.2848947240. The cubic root of 845197749 is about 945.4809376931.

The spelling of 845197749 in words is "eight hundred forty-five million, one hundred ninety-seven thousand, seven hundred forty-nine".