49815409 has 6 divisors (see below), whose sum is σ = 57948594. Its totient is φ = 42698880.

The previous prime is 49815407. The next prime is 49815433. The reversal of 49815409 is 90451894.

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 815409 = 7000^2 + 903^2 .

It is not a de Polignac number, because 49815409 - 2¹ = 49815407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49815407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508272 + ... + 508369.

It is an arithmetic number, because the mean of its divisors is an integer number (9658099).

Almost surely, 2^49815409 is an apocalyptic number.

49815409 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

49815409 is a deficient number, since it is larger than the sum of its proper divisors (8133185).

49815409 is a wasteful number, since it uses less digits than its factorization.

49815409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016655 (or 1016648 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 49815409 is about 7058.0031878712. The cubic root of 49815409 is about 367.9492314376.

It can be divided in two parts, 49 and 815409, that multiplied together give a square (39955041 = 6321²).

The spelling of 49815409 in words is "forty-nine million, eight hundred fifteen thousand, four hundred nine".