3967897619 has 4 divisors (see below), whose sum is σ = 4534740144. Its totient is φ = 3401055096.

The previous prime is 3967897613. The next prime is 3967897621. The reversal of 3967897619 is 9167987693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9167987693 = 27809 ⋅329677.

It is a cyclic number.

It is not a de Polignac number, because 3967897619 - 2²⁰ = 3966849043 is a prime.

It is a super-2 number, since 2×3967897619² = 31488423029731738322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3967897613) 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, 283421252 + ... + 283421265.

It is an arithmetic number, because the mean of its divisors is an integer number (1133685036).

Almost surely, 2^3967897619 is an apocalyptic number.

3967897619 is a deficient number, since it is larger than the sum of its proper divisors (566842525).

3967897619 is an equidigital number, since it uses as much as digits as its factorization.

3967897619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566842524.

The product of its digits is 30862944, while the sum is 65.

The square root of 3967897619 is about 62991.2503368523. The cubic root of 3967897619 is about 1583.1430277302.

The spelling of 3967897619 in words is "three billion, nine hundred sixty-seven million, eight hundred ninety-seven thousand, six hundred nineteen".