406944870749 has 4 divisors (see below), whose sum is σ = 407023573440. Its totient is φ = 406866168060.

The previous prime is 406944870677. The next prime is 406944870751. The reversal of 406944870749 is 947078449604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406944870749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406944870691 and 406944870700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406944870149) 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, 39343589 + ... + 39353930.

It is an arithmetic number, because the mean of its divisors is an integer number (101755893360).

Almost surely, 2^406944870749 is an apocalyptic number.

It is an amenable number.

406944870749 is a deficient number, since it is larger than the sum of its proper divisors (78702691).

406944870749 is an equidigital number, since it uses as much as digits as its factorization.

406944870749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78702690.

The product of its (nonzero) digits is 48771072, while the sum is 62.

The spelling of 406944870749 in words is "four hundred six billion, nine hundred forty-four million, eight hundred seventy thousand, seven hundred forty-nine".