406751689 has 2 divisors, whose sum is σ = 406751690. Its totient is φ = 406751688.

The previous prime is 406751659. The next prime is 406751701. The reversal of 406751689 is 986157604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210975625 + 195776064 = 14525^2 + 13992^2 .

It is a cyclic number.

It is not a de Polignac number, because 406751689 - 2⁷ = 406751561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406751659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203375844 + 203375845.

It is an arithmetic number, because the mean of its divisors is an integer number (203375845).

Almost surely, 2^406751689 is an apocalyptic number.

It is an amenable number.

406751689 is a deficient number, since it is larger than the sum of its proper divisors (1).

406751689 is an equidigital number, since it uses as much as digits as its factorization.

406751689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 406751689 is about 20168.0859032284. The cubic root of 406751689 is about 740.9287638312.

The spelling of 406751689 in words is "four hundred six million, seven hundred fifty-one thousand, six hundred eighty-nine".