407780897 has 2 divisors, whose sum is σ = 407780898. Its totient is φ = 407780896.

The previous prime is 407780837. The next prime is 407780899. The reversal of 407780897 is 798087704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216207616 + 191573281 = 14704^2 + 13841^2 .

It is a cyclic number.

It is not a de Polignac number, because 407780897 - 2⁶ = 407780833 is a prime.

Together with 407780899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (407780899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203890448 + 203890449.

It is an arithmetic number, because the mean of its divisors is an integer number (203890449).

Almost surely, 2^407780897 is an apocalyptic number.

It is an amenable number.

407780897 is a deficient number, since it is larger than the sum of its proper divisors (1).

407780897 is an equidigital number, since it uses as much as digits as its factorization.

407780897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 790272, while the sum is 50.

The square root of 407780897 is about 20193.5855409583. The cubic root of 407780897 is about 741.5531640529.

The spelling of 407780897 in words is "four hundred seven million, seven hundred eighty thousand, eight hundred ninety-seven".