406736989 has 2 divisors, whose sum is σ = 406736990. Its totient is φ = 406736988.

The previous prime is 406736987. The next prime is 406737077. The reversal of 406736989 is 989637604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378964089 + 27772900 = 19467^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 406736989 - 2¹ = 406736987 is a prime.

It is a super-2 number, since 2×406736989² = 330869956441572242, which contains 22 as substring.

Together with 406736987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406736987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203368494 + 203368495.

It is an arithmetic number, because the mean of its divisors is an integer number (203368495).

Almost surely, 2^406736989 is an apocalyptic number.

It is an amenable number.

406736989 is a deficient number, since it is larger than the sum of its proper divisors (1).

406736989 is an equidigital number, since it uses as much as digits as its factorization.

406736989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 406736989 is about 20167.7214627731. The cubic root of 406736989 is about 740.9198380055.

The spelling of 406736989 in words is "four hundred six million, seven hundred thirty-six thousand, nine hundred eighty-nine".