407409749 has 4 divisors (see below), whose sum is σ = 407725164. Its totient is φ = 407094336.

The previous prime is 407409731. The next prime is 407409763. The reversal of 407409749 is 947904704.

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 323100625 + 84309124 = 17975^2 + 9182^2 .

It is a cyclic number.

It is not a de Polignac number, because 407409749 - 2⁸ = 407409493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407409349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155762 + ... + 158355.

It is an arithmetic number, because the mean of its divisors is an integer number (101931291).

Almost surely, 2^407409749 is an apocalyptic number.

It is an amenable number.

407409749 is a deficient number, since it is larger than the sum of its proper divisors (315415).

407409749 is a wasteful number, since it uses less digits than its factorization.

407409749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315414.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 407409749 is about 20184.3936990934. The cubic root of 407409749 is about 741.3281171233.

The spelling of 407409749 in words is "four hundred seven million, four hundred nine thousand, seven hundred forty-nine".