32001989 has 2 divisors, whose sum is σ = 32001990. Its totient is φ = 32001988.

The previous prime is 32001979. The next prime is 32002021. The reversal of 32001989 is 98910023.

It is an a-pointer prime, because the next prime (32002021) can be obtained adding 32001989 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30713764 + 1288225 = 5542^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 32001989 - 2⁸ = 32001733 is a prime.

It is a super-2 number, since 2×32001989² = 2048254599912242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32001919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16000994 + 16000995.

It is an arithmetic number, because the mean of its divisors is an integer number (16000995).

Almost surely, 2^32001989 is an apocalyptic number.

It is an amenable number.

32001989 is a deficient number, since it is larger than the sum of its proper divisors (1).

32001989 is an equidigital number, since it uses as much as digits as its factorization.

32001989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 32001989 is about 5657.0300511841. The cubic root of 32001989 is about 317.4867880505.

The spelling of 32001989 in words is "thirty-two million, one thousand, nine hundred eighty-nine".