49787691 has 4 divisors (see below), whose sum is σ = 66383592. Its totient is φ = 33191792.

The previous prime is 49787677. The next prime is 49787701. The reversal of 49787691 is 19678794.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49787691 - 2⁵ = 49787659 is a prime.

It is a super-2 number, since 2×49787691² = 4957628350222962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49787641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8297946 + ... + 8297951.

It is an arithmetic number, because the mean of its divisors is an integer number (16595898).

Almost surely, 2^49787691 is an apocalyptic number.

49787691 is a deficient number, since it is larger than the sum of its proper divisors (16595901).

49787691 is a wasteful number, since it uses less digits than its factorization.

49787691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16595900.

The product of its digits is 762048, while the sum is 51.

The square root of 49787691 is about 7056.0393281217. The cubic root of 49787691 is about 367.8809747196.

It can be divided in two parts, 497 and 87691, that added together give a palindrome (88188).

The spelling of 49787691 in words is "forty-nine million, seven hundred eighty-seven thousand, six hundred ninety-one".