49990061 has 6 divisors (see below), whose sum is σ = 54947886. Its totient is φ = 45445400.

The previous prime is 49989991. The next prime is 49990069. The reversal of 49990061 is 16009994.

It can be written as a sum of positive squares in only one way, i.e., 25050025 + 24940036 = 5005^2 + 4994^2 .

It is a de Polignac number, because none of the positive numbers 2^k-49990061 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 = 49989997 and 49990024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49990069) 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, 206450 + ... + 206691.

It is an arithmetic number, because the mean of its divisors is an integer number (9157981).

Almost surely, 2^49990061 is an apocalyptic number.

It is an amenable number.

49990061 is a deficient number, since it is larger than the sum of its proper divisors (4957825).

49990061 is a wasteful number, since it uses less digits than its factorization.

49990061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413163 (or 413152 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 49990061 is about 7070.3649835069. The cubic root of 49990061 is about 368.3787378537.

The spelling of 49990061 in words is "forty-nine million, nine hundred ninety thousand, sixty-one".