80389657 has 2 divisors, whose sum is σ = 80389658. Its totient is φ = 80389656.

The previous prime is 80389609. The next prime is 80389691. The reversal of 80389657 is 75698308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59923081 + 20466576 = 7741^2 + 4524^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80389657 is a prime.

It is not a weakly prime, because it can be changed into another prime (80389607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40194828 + 40194829.

It is an arithmetic number, because the mean of its divisors is an integer number (40194829).

Almost surely, 2^80389657 is an apocalyptic number.

It is an amenable number.

80389657 is a deficient number, since it is larger than the sum of its proper divisors (1).

80389657 is an equidigital number, since it uses as much as digits as its factorization.

80389657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 80389657 is about 8966.0279388367. The cubic root of 80389657 is about 431.5853807246.

The spelling of 80389657 in words is "eighty million, three hundred eighty-nine thousand, six hundred fifty-seven".