407949791 has 2 divisors, whose sum is σ = 407949792. Its totient is φ = 407949790.

The previous prime is 407949691. The next prime is 407949793. The reversal of 407949791 is 197949704.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-407949791 is a prime.

It is a super-3 number, since 3×407949791³ (a number of 27 digits) contains 333 as substring.

Together with 407949793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (407949793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203974895 + 203974896.

It is an arithmetic number, because the mean of its divisors is an integer number (203974896).

Almost surely, 2^407949791 is an apocalyptic number.

407949791 is a deficient number, since it is larger than the sum of its proper divisors (1).

407949791 is an equidigital number, since it uses as much as digits as its factorization.

407949791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 407949791 is about 20197.7669805352. The cubic root of 407949791 is about 741.6555283322.

The spelling of 407949791 in words is "four hundred seven million, nine hundred forty-nine thousand, seven hundred ninety-one".