3845173897 has 2 divisors, whose sum is σ = 3845173898. Its totient is φ = 3845173896.

The previous prime is 3845173867. The next prime is 3845173949. The reversal of 3845173897 is 7983715483.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3787048521 + 58125376 = 61539^2 + 7624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3845173897 is a prime.

It is not a weakly prime, because it can be changed into another prime (3845173837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1922586948 + 1922586949.

It is an arithmetic number, because the mean of its divisors is an integer number (1922586949).

Almost surely, 2^3845173897 is an apocalyptic number.

It is an amenable number.

3845173897 is a deficient number, since it is larger than the sum of its proper divisors (1).

3845173897 is an equidigital number, since it uses as much as digits as its factorization.

3845173897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The square root of 3845173897 is about 62009.4661886393. The cubic root of 3845173897 is about 1566.6500436796.

The spelling of 3845173897 in words is "three billion, eight hundred forty-five million, one hundred seventy-three thousand, eight hundred ninety-seven".