3845438697 has 4 divisors (see below), whose sum is σ = 5127251600. Its totient is φ = 2563625796.

The previous prime is 3845438689. The next prime is 3845438699. The reversal of 3845438697 is 7968345483.

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.

It is not a de Polignac number, because 3845438697 - 2³ = 3845438689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3845438699) 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, 640906447 + ... + 640906452.

It is an arithmetic number, because the mean of its divisors is an integer number (1281812900).

Almost surely, 2^3845438697 is an apocalyptic number.

It is an amenable number.

3845438697 is a deficient number, since it is larger than the sum of its proper divisors (1281812903).

3845438697 is a wasteful number, since it uses less digits than its factorization.

3845438697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281812902.

The product of its digits is 17418240, while the sum is 57.

The square root of 3845438697 is about 62011.6013097549. The cubic root of 3845438697 is about 1566.6860055910.

The spelling of 3845438697 in words is "three billion, eight hundred forty-five million, four hundred thirty-eight thousand, six hundred ninety-seven".