782448991 has 4 divisors (see below), whose sum is σ = 782976672. Its totient is φ = 781921312.

The previous prime is 782448923. The next prime is 782449001. The reversal of 782448991 is 199844287.

It is a happy number.

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 782448991 - 2¹¹ = 782446943 is a prime.

It is a super-2 number, since 2×782448991² = 1224452847033836162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (782448691) 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, 261610 + ... + 264583.

It is an arithmetic number, because the mean of its divisors is an integer number (195744168).

Almost surely, 2^782448991 is an apocalyptic number.

782448991 is a deficient number, since it is larger than the sum of its proper divisors (527681).

782448991 is a wasteful number, since it uses less digits than its factorization.

782448991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527680.

The product of its digits is 1161216, while the sum is 52.

The square root of 782448991 is about 27972.2896989145. The cubic root of 782448991 is about 921.4787933663.

The spelling of 782448991 in words is "seven hundred eighty-two million, four hundred forty-eight thousand, nine hundred ninety-one".