80356949 has 2 divisors, whose sum is σ = 80356950. Its totient is φ = 80356948.

The previous prime is 80356937. The next prime is 80356951. The reversal of 80356949 is 94965308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40729924 + 39627025 = 6382^2 + 6295^2 .

It is a cyclic number.

It is not a de Polignac number, because 80356949 - 2⁸ = 80356693 is a prime.

It is a Sophie Germain prime.

Together with 80356951, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80356979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40178474 + 40178475.

It is an arithmetic number, because the mean of its divisors is an integer number (40178475).

Almost surely, 2^80356949 is an apocalyptic number.

It is an amenable number.

80356949 is a deficient number, since it is larger than the sum of its proper divisors (1).

80356949 is an equidigital number, since it uses as much as digits as its factorization.

80356949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 80356949 is about 8964.2037571666. The cubic root of 80356949 is about 431.5268399865.

The spelling of 80356949 in words is "eighty million, three hundred fifty-six thousand, nine hundred forty-nine".