49994509 has 4 divisors (see below), whose sum is σ = 51157216. Its totient is φ = 48831804.

The previous prime is 49994507. The next prime is 49994533. The reversal of 49994509 is 90549994.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90549994 = 2 ⋅45274997.

It is a cyclic number.

It is not a de Polignac number, because 49994509 - 2¹ = 49994507 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 (49994507) 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, 581289 + ... + 581374.

It is an arithmetic number, because the mean of its divisors is an integer number (12789304).

Almost surely, 2^49994509 is an apocalyptic number.

It is an amenable number.

49994509 is a deficient number, since it is larger than the sum of its proper divisors (1162707).

49994509 is a wasteful number, since it uses less digits than its factorization.

49994509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162706.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 49994509 is about 7070.6795288713. The cubic root of 49994509 is about 368.3896633590.

The spelling of 49994509 in words is "forty-nine million, nine hundred ninety-four thousand, five hundred nine".