4087969 has 2 divisors, whose sum is σ = 4087970. Its totient is φ = 4087968.

The previous prime is 4087957. The next prime is 4087991. The reversal of 4087969 is 9697804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4080400 + 7569 = 2020^2 + 87^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4087969 is a prime.

It is a super-2 number, since 2×4087969² = 33422981089922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4087949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2043984 + 2043985.

It is an arithmetic number, because the mean of its divisors is an integer number (2043985).

Almost surely, 2^4087969 is an apocalyptic number.

It is an amenable number.

4087969 is a deficient number, since it is larger than the sum of its proper divisors (1).

4087969 is an equidigital number, since it uses as much as digits as its factorization.

4087969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 4087969 is about 2021.8726468302. The cubic root of 4087969 is about 159.8953612695.

The spelling of 4087969 in words is "four million, eighty-seven thousand, nine hundred sixty-nine".