406745657 has 2 divisors, whose sum is σ = 406745658. Its totient is φ = 406745656.

The previous prime is 406745629. The next prime is 406745681. The reversal of 406745657 is 756547604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363436096 + 43309561 = 19064^2 + 6581^2 .

It is a cyclic number.

It is not a de Polignac number, because 406745657 - 2¹⁶ = 406680121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406745687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203372828 + 203372829.

It is an arithmetic number, because the mean of its divisors is an integer number (203372829).

Almost surely, 2^406745657 is an apocalyptic number.

It is an amenable number.

406745657 is a deficient number, since it is larger than the sum of its proper divisors (1).

406745657 is an equidigital number, since it uses as much as digits as its factorization.

406745657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 44.

The square root of 406745657 is about 20167.9363594791. The cubic root of 406745657 is about 740.9251012327.

The spelling of 406745657 in words is "four hundred six million, seven hundred forty-five thousand, six hundred fifty-seven".