408828997 has 2 divisors, whose sum is σ = 408828998. Its totient is φ = 408828996.

The previous prime is 408828989. The next prime is 408829007. The reversal of 408828997 is 799828804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366760801 + 42068196 = 19151^2 + 6486^2 .

It is a cyclic number.

It is not a de Polignac number, because 408828997 - 2³ = 408828989 is a prime.

It is a super-2 number, since 2×408828997² = 334282297576052018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408828977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204414498 + 204414499.

It is an arithmetic number, because the mean of its divisors is an integer number (204414499).

Almost surely, 2^408828997 is an apocalyptic number.

It is an amenable number.

408828997 is a deficient number, since it is larger than the sum of its proper divisors (1).

408828997 is an equidigital number, since it uses as much as digits as its factorization.

408828997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The square root of 408828997 is about 20219.5201970769. The cubic root of 408828997 is about 742.1879468824.

The spelling of 408828997 in words is "four hundred eight million, eight hundred twenty-eight thousand, nine hundred ninety-seven".