49781659 has 4 divisors (see below), whose sum is σ = 50939416. Its totient is φ = 48623904.

The previous prime is 49781647. The next prime is 49781701. The reversal of 49781659 is 95618794.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49781659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49781639) 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, 578814 + ... + 578899.

It is an arithmetic number, because the mean of its divisors is an integer number (12734854).

Almost surely, 2^49781659 is an apocalyptic number.

49781659 is a deficient number, since it is larger than the sum of its proper divisors (1157757).

49781659 is a wasteful number, since it uses less digits than its factorization.

49781659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157756.

The product of its digits is 544320, while the sum is 49.

The square root of 49781659 is about 7055.6118799152. The cubic root of 49781659 is about 367.8661173147.

The spelling of 49781659 in words is "forty-nine million, seven hundred eighty-one thousand, six hundred fifty-nine".