782639961 has 4 divisors (see below), whose sum is σ = 1043519952. Its totient is φ = 521759972.

The previous prime is 782639959. The next prime is 782639969. The reversal of 782639961 is 169936287.

782639961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 782639961 - 2¹ = 782639959 is a prime.

It is a super-2 number, since 2×782639961² = 1225050617108163042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (782639969) 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, 130439991 + ... + 130439996.

It is an arithmetic number, because the mean of its divisors is an integer number (260879988).

Almost surely, 2^782639961 is an apocalyptic number.

It is an amenable number.

782639961 is a deficient number, since it is larger than the sum of its proper divisors (260879991).

782639961 is a wasteful number, since it uses less digits than its factorization.

782639961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260879990.

The product of its digits is 979776, while the sum is 51.

The square root of 782639961 is about 27975.7030474660. The cubic root of 782639961 is about 921.5537547984.

The spelling of 782639961 in words is "seven hundred eighty-two million, six hundred thirty-nine thousand, nine hundred sixty-one".