3897657539434 has 4 divisors (see below), whose sum is σ = 5846486309154. Its totient is φ = 1948828769716.

The previous prime is 3897657539431. The next prime is 3897657539449. The reversal of 3897657539434 is 4349357567983.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 3870871307209 + 26786232225 = 1967453^2 + 163665^2 .

It is not an unprimeable number, because it can be changed into a prime (3897657539431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974414384857 + ... + 974414384860.

Almost surely, 2^{3897657539434} is an apocalyptic number.

3897657539434 is a deficient number, since it is larger than the sum of its proper divisors (1948828769720).

3897657539434 is a wasteful number, since it uses less digits than its factorization.

3897657539434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948828769719.

The product of its digits is 2057529600, while the sum is 73.

The spelling of 3897657539434 in words is "three trillion, eight hundred ninety-seven billion, six hundred fifty-seven million, five hundred thirty-nine thousand, four hundred thirty-four".