3917764897 has 4 divisors (see below), whose sum is σ = 3917906820. Its totient is φ = 3917622976.

The previous prime is 3917764883. The next prime is 3917764909. The reversal of 3917764897 is 7984677193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7984677193 = 3463 ⋅2305711.

It can be written as a sum of positive squares in 2 ways, for example, as 2190614416 + 1727150481 = 46804^2 + 41559^2 .

It is a cyclic number.

It is not a de Polignac number, because 3917764897 - 2⁷ = 3917764769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3917764817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14668 + ... + 89725.

It is an arithmetic number, because the mean of its divisors is an integer number (979476705).

Almost surely, 2^3917764897 is an apocalyptic number.

It is an amenable number.

3917764897 is a deficient number, since it is larger than the sum of its proper divisors (141923).

3917764897 is a wasteful number, since it uses less digits than its factorization.

3917764897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141922.

The product of its digits is 16003008, while the sum is 61.

The square root of 3917764897 is about 62592.0513883352. The cubic root of 3917764897 is about 1576.4472994542.

The spelling of 3917764897 in words is "three billion, nine hundred seventeen million, seven hundred sixty-four thousand, eight hundred ninety-seven".