3988973 has 4 divisors (see below), whose sum is σ = 4054428. Its totient is φ = 3923520.

The previous prime is 3988969. The next prime is 3988991. The reversal of 3988973 is 3798893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 310249 + 3678724 = 557^2 + 1918^2 .

It is not a de Polignac number, because 3988973 - 2² = 3988969 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988903) 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, 32636 + ... + 32757.

It is an arithmetic number, because the mean of its divisors is an integer number (1013607).

Almost surely, 2^3988973 is an apocalyptic number.

It is an amenable number.

3988973 is a deficient number, since it is larger than the sum of its proper divisors (65455).

3988973 is an equidigital number, since it uses as much as digits as its factorization.

3988973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65454.

The product of its digits is 326592, while the sum is 47.

The square root of 3988973 is about 1997.2413474590. The cubic root of 3988973 is about 158.5941020214.

The spelling of 3988973 in words is "three million, nine hundred eighty-eight thousand, nine hundred seventy-three".