3870989 has 4 divisors (see below), whose sum is σ = 3961056. Its totient is φ = 3780924.

The previous prime is 3870983. The next prime is 3871009. The reversal of 3870989 is 9890783.

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: 9890783 = 7 ⋅1412969.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3870989 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3870983) 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, 44969 + ... + 45054.

It is an arithmetic number, because the mean of its divisors is an integer number (990264).

Almost surely, 2^3870989 is an apocalyptic number.

It is an amenable number.

3870989 is a deficient number, since it is larger than the sum of its proper divisors (90067).

3870989 is an equidigital number, since it uses as much as digits as its factorization.

3870989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90066.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 3870989 is about 1967.4829097098. The cubic root of 3870989 is about 157.0148200272.

The spelling of 3870989 in words is "three million, eight hundred seventy thousand, nine hundred eighty-nine".