787171049 has 4 divisors (see below), whose sum is σ = 899624064. Its totient is φ = 674718036.

The previous prime is 787171031. The next prime is 787171057. The reversal of 787171049 is 940171787.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 787171049 - 2⁸ = 787170793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787171069) 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, 56226497 + ... + 56226510.

It is an arithmetic number, because the mean of its divisors is an integer number (224906016).

Almost surely, 2^787171049 is an apocalyptic number.

It is an amenable number.

787171049 is a deficient number, since it is larger than the sum of its proper divisors (112453015).

787171049 is a wasteful number, since it uses less digits than its factorization.

787171049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112453014.

The product of its (nonzero) digits is 98784, while the sum is 44.

The square root of 787171049 is about 28056.5687317605. The cubic root of 787171049 is about 923.3287764795.

The spelling of 787171049 in words is "seven hundred eighty-seven million, one hundred seventy-one thousand, forty-nine".