4387969 has 2 divisors, whose sum is σ = 4387970. Its totient is φ = 4387968.

The previous prime is 4387939. The next prime is 4387979. The reversal of 4387969 is 9697834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4355569 + 32400 = 2087^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 4387969 - 2⁵ = 4387937 is a prime.

It is a super-2 number, since 2×4387969² = 38508543889922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4387919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2193984 + 2193985.

It is an arithmetic number, because the mean of its divisors is an integer number (2193985).

Almost surely, 2^4387969 is an apocalyptic number.

It is an amenable number.

4387969 is a deficient number, since it is larger than the sum of its proper divisors (1).

4387969 is an equidigital number, since it uses as much as digits as its factorization.

4387969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 4387969 is about 2094.7479561990. The cubic root of 4387969 is about 163.7147654509.

It can be divided in two parts, 4387 and 969, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 4387969 in words is "four million, three hundred eighty-seven thousand, nine hundred sixty-nine".