3861920269 has 4 divisors (see below), whose sum is σ = 3862255680. Its totient is φ = 3861584860.

The previous prime is 3861920233. The next prime is 3861920287. The reversal of 3861920269 is 9620291683.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9620291683 = 10399 ⋅925117.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3861920269 is a prime.

It is a super-2 number, since 2×3861920269² = 29828856328226064722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861920219) 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, 149797 + ... + 173674.

It is an arithmetic number, because the mean of its divisors is an integer number (965563920).

Almost surely, 2^3861920269 is an apocalyptic number.

It is an amenable number.

3861920269 is a deficient number, since it is larger than the sum of its proper divisors (335411).

3861920269 is a wasteful number, since it uses less digits than its factorization.

3861920269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335410.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 3861920269 is about 62144.3502580886. The cubic root of 3861920269 is about 1568.9210904567.

The spelling of 3861920269 in words is "three billion, eight hundred sixty-one million, nine hundred twenty thousand, two hundred sixty-nine".