409749941 has 4 divisors (see below), whose sum is σ = 419743884. Its totient is φ = 399756000.

The previous prime is 409749919. The next prime is 409749979. The reversal of 409749941 is 149947904.

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 131560900 + 278189041 = 11470^2 + 16679^2 .

It is a cyclic number.

It is not a de Polignac number, because 409749941 - 2²⁶ = 342641077 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 (409749541) 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, 4996910 + ... + 4996991.

It is an arithmetic number, because the mean of its divisors is an integer number (104935971).

Almost surely, 2^409749941 is an apocalyptic number.

409749941 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

409749941 is a deficient number, since it is larger than the sum of its proper divisors (9993943).

409749941 is an equidigital number, since it uses as much as digits as its factorization.

409749941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9993942.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 409749941 is about 20242.2810226516. The cubic root of 409749941 is about 742.7448226965.

The spelling of 409749941 in words is "four hundred nine million, seven hundred forty-nine thousand, nine hundred forty-one".