80321537 has 2 divisors, whose sum is σ = 80321538. Its totient is φ = 80321536.

The previous prime is 80321533. The next prime is 80321551. The reversal of 80321537 is 73512308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66601921 + 13719616 = 8161^2 + 3704^2 .

It is a cyclic number.

It is not a de Polignac number, because 80321537 - 2² = 80321533 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80321533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40160768 + 40160769.

It is an arithmetic number, because the mean of its divisors is an integer number (40160769).

Almost surely, 2^80321537 is an apocalyptic number.

It is an amenable number.

80321537 is a deficient number, since it is larger than the sum of its proper divisors (1).

80321537 is an equidigital number, since it uses as much as digits as its factorization.

80321537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 80321537 is about 8962.2283501370. The cubic root of 80321537 is about 431.4634417203.

The spelling of 80321537 in words is "eighty million, three hundred twenty-one thousand, five hundred thirty-seven".