49672129 has 4 divisors (see below), whose sum is σ = 53493076. Its totient is φ = 45851184.

The previous prime is 49672127. The next prime is 49672141. The reversal of 49672129 is 92127694.

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 32433025 + 17239104 = 5695^2 + 4152^2 .

It is a cyclic number.

It is not a de Polignac number, because 49672129 - 2¹ = 49672127 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 49672091 and 49672100.

It is not an unprimeable number, because it can be changed into a prime (49672121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910454 + ... + 1910479.

It is an arithmetic number, because the mean of its divisors is an integer number (13373269).

Almost surely, 2^49672129 is an apocalyptic number.

It is an amenable number.

49672129 is a deficient number, since it is larger than the sum of its proper divisors (3820947).

49672129 is a wasteful number, since it uses less digits than its factorization.

49672129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820946.

The product of its digits is 54432, while the sum is 40.

The square root of 49672129 is about 7047.8456992190. The cubic root of 49672129 is about 367.5961252242.

The spelling of 49672129 in words is "forty-nine million, six hundred seventy-two thousand, one hundred twenty-nine".