3780309989 has 4 divisors (see below), whose sum is σ = 3781703040. Its totient is φ = 3778916940.

The previous prime is 3780309961. The next prime is 3780309991. The reversal of 3780309989 is 9899030873.

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: 9899030873 = 109 ⋅90816797.

It is a cyclic number.

It is not a de Polignac number, because 3780309989 - 2²⁸ = 3511874533 is a prime.

It is a super-2 number, since 2×3780309989² = 28581487225866360242, 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 (3780309919) 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, 692447 + ... + 697884.

It is an arithmetic number, because the mean of its divisors is an integer number (945425760).

Almost surely, 2^3780309989 is an apocalyptic number.

It is an amenable number.

3780309989 is a deficient number, since it is larger than the sum of its proper divisors (1393051).

3780309989 is a wasteful number, since it uses less digits than its factorization.

3780309989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393050.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The square root of 3780309989 is about 61484.2255298056. The cubic root of 3780309989 is about 1557.7908118267.

The spelling of 3780309989 in words is "three billion, seven hundred eighty million, three hundred nine thousand, nine hundred eighty-nine".