32147989 has 2 divisors, whose sum is σ = 32147990. Its totient is φ = 32147988.

The previous prime is 32147933. The next prime is 32148013. The reversal of 32147989 is 98974123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30140100 + 2007889 = 5490^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 32147989 - 2¹⁵ = 32115221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32147909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16073994 + 16073995.

It is an arithmetic number, because the mean of its divisors is an integer number (16073995).

Almost surely, 2^32147989 is an apocalyptic number.

It is an amenable number.

32147989 is a deficient number, since it is larger than the sum of its proper divisors (1).

32147989 is an equidigital number, since it uses as much as digits as its factorization.

32147989 is an evil number, because the sum of its binary digits is even.

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

The square root of 32147989 is about 5669.9196643339. The cubic root of 32147989 is about 317.9688701513.

The spelling of 32147989 in words is "thirty-two million, one hundred forty-seven thousand, nine hundred eighty-nine".