80167621 has 2 divisors, whose sum is σ = 80167622. Its totient is φ = 80167620.

The previous prime is 80167583. The next prime is 80167667. The reversal of 80167621 is 12676108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48650625 + 31516996 = 6975^2 + 5614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80167621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80167691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40083810 + 40083811.

It is an arithmetic number, because the mean of its divisors is an integer number (40083811).

Almost surely, 2^80167621 is an apocalyptic number.

It is an amenable number.

80167621 is a deficient number, since it is larger than the sum of its proper divisors (1).

80167621 is an equidigital number, since it uses as much as digits as its factorization.

80167621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 80167621 is about 8953.6373055870. The cubic root of 80167621 is about 431.1876684820.

The spelling of 80167621 in words is "eighty million, one hundred sixty-seven thousand, six hundred twenty-one".