32640437 has 2 divisors, whose sum is σ = 32640438. Its totient is φ = 32640436.

The previous prime is 32640431. The next prime is 32640451. The reversal of 32640437 is 73404623.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23435281 + 9205156 = 4841^2 + 3034^2 .

It is a cyclic number.

It is not a de Polignac number, because 32640437 - 2⁶ = 32640373 is a prime.

It is a Chen prime.

It is equal to p_2010899 and since 32640437 and 2010899 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32640431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16320218 + 16320219.

It is an arithmetic number, because the mean of its divisors is an integer number (16320219).

Almost surely, 2^32640437 is an apocalyptic number.

It is an amenable number.

32640437 is a deficient number, since it is larger than the sum of its proper divisors (1).

32640437 is an equidigital number, since it uses as much as digits as its factorization.

32640437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 32640437 is about 5713.1809878561. The cubic root of 32640437 is about 319.5842158544.

The spelling of 32640437 in words is "thirty-two million, six hundred forty thousand, four hundred thirty-seven".