49391291 has 4 divisors (see below), whose sum is σ = 49667400. Its totient is φ = 49115184.

The previous prime is 49391269. The next prime is 49391311. The reversal of 49391291 is 19219394.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19219394 = 2 ⋅9609697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49391291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49391231) 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, 137786 + ... + 138143.

It is an arithmetic number, because the mean of its divisors is an integer number (12416850).

Almost surely, 2^49391291 is an apocalyptic number.

49391291 is a deficient number, since it is larger than the sum of its proper divisors (276109).

49391291 is a wasteful number, since it uses less digits than its factorization.

49391291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276108.

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

The square root of 49391291 is about 7027.8937812121. The cubic root of 49391291 is about 366.9020396011.

The spelling of 49391291 in words is "forty-nine million, three hundred ninety-one thousand, two hundred ninety-one".