49087391 has 4 divisors (see below), whose sum is σ = 49107552. Its totient is φ = 49067232.

The previous prime is 49087333. The next prime is 49087399. The reversal of 49087391 is 19378094.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19378094 = 2 ⋅9689047.

It is a cyclic number.

It is not a de Polignac number, because 49087391 - 2¹⁴ = 49071007 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 (49087399) 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, 5831 + ... + 11496.

It is an arithmetic number, because the mean of its divisors is an integer number (12276888).

Almost surely, 2^49087391 is an apocalyptic number.

49087391 is a deficient number, since it is larger than the sum of its proper divisors (20161).

49087391 is a wasteful number, since it uses less digits than its factorization.

49087391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20160.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 49087391 is about 7006.2394335335. The cubic root of 49087391 is about 366.1479862806.

The spelling of 49087391 in words is "forty-nine million, eighty-seven thousand, three hundred ninety-one".