406702649 has 4 divisors (see below), whose sum is σ = 407307636. Its totient is φ = 406097664.

The previous prime is 406702633. The next prime is 406702651. The reversal of 406702649 is 946207604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222964624 + 183738025 = 14932^2 + 13555^2 .

It is a cyclic number.

It is not a de Polignac number, because 406702649 - 2⁴ = 406702633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406702669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301484 + ... + 302829.

It is an arithmetic number, because the mean of its divisors is an integer number (101826909).

Almost surely, 2^406702649 is an apocalyptic number.

It is an amenable number.

406702649 is a deficient number, since it is larger than the sum of its proper divisors (604987).

406702649 is an equidigital number, since it uses as much as digits as its factorization.

406702649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604986.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 406702649 is about 20166.8700843735. The cubic root of 406702649 is about 740.8989859528.

The spelling of 406702649 in words is "four hundred six million, seven hundred two thousand, six hundred forty-nine".