49000013 has 4 divisors (see below), whose sum is σ = 49219968. Its totient is φ = 48780060.

The previous prime is 48999989. The next prime is 49000027. The reversal of 49000013 is 31000094.

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: 31000094 = 2 ⋅15500047.

It is a cyclic number.

It is not a de Polignac number, because 49000013 - 2⁸ = 48999757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 48999955 and 49000000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49000033) 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, 109643 + ... + 110088.

It is an arithmetic number, because the mean of its divisors is an integer number (12304992).

Almost surely, 2^49000013 is an apocalyptic number.

It is an amenable number.

49000013 is a deficient number, since it is larger than the sum of its proper divisors (219955).

49000013 is a wasteful number, since it uses less digits than its factorization.

49000013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219954.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 49000013 is about 7000.0009285714. Note that the first 3 decimals coincide. The cubic root of 49000013 is about 365.9306033635.

The spelling of 49000013 in words is "forty-nine million, thirteen", and thus it is an aban number and an uban number.