406396997 has 2 divisors, whose sum is σ = 406396998. Its totient is φ = 406396996.

The previous prime is 406396973. The next prime is 406397063. The reversal of 406396997 is 799693604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365039236 + 41357761 = 19106^2 + 6431^2 .

It is a cyclic number.

It is not a de Polignac number, because 406396997 - 2⁶ = 406396933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406396097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203198498 + 203198499.

It is an arithmetic number, because the mean of its divisors is an integer number (203198499).

Almost surely, 2^406396997 is an apocalyptic number.

It is an amenable number.

406396997 is a deficient number, since it is larger than the sum of its proper divisors (1).

406396997 is an equidigital number, since it uses as much as digits as its factorization.

406396997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The square root of 406396997 is about 20159.2905877166. The cubic root of 406396997 is about 740.7133351574.

The spelling of 406396997 in words is "four hundred six million, three hundred ninety-six thousand, nine hundred ninety-seven".