897803749 has 4 divisors (see below), whose sum is σ = 898237260. Its totient is φ = 897370240.

The previous prime is 897803743. The next prime is 897803761. The reversal of 897803749 is 947308798.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 465912225 + 431891524 = 21585^2 + 20782^2 .

It is a cyclic number.

It is not a de Polignac number, because 897803749 - 2⁵ = 897803717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 897803749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897803743) 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, 213634 + ... + 217795.

It is an arithmetic number, because the mean of its divisors is an integer number (224559315).

Almost surely, 2^897803749 is an apocalyptic number.

It is an amenable number.

897803749 is a deficient number, since it is larger than the sum of its proper divisors (433511).

897803749 is a wasteful number, since it uses less digits than its factorization.

897803749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433510.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 897803749 is about 29963.3734582740. The cubic root of 897803749 is about 964.7033904560.

The spelling of 897803749 in words is "eight hundred ninety-seven million, eight hundred three thousand, seven hundred forty-nine".