781379714 has 4 divisors (see below), whose sum is σ = 1172069574. Its totient is φ = 390689856.

The previous prime is 781379671. The next prime is 781379723. The reversal of 781379714 is 417973187.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 758176225 + 23203489 = 27535^2 + 4817^2 .

It is a super-2 number, since 2×781379714² = 1221108514901443592, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195344927 + ... + 195344930.

Almost surely, 2^781379714 is an apocalyptic number.

781379714 is a deficient number, since it is larger than the sum of its proper divisors (390689860).

781379714 is a wasteful number, since it uses less digits than its factorization.

781379714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390689859.

The product of its digits is 296352, while the sum is 47.

The square root of 781379714 is about 27953.1700170124. The cubic root of 781379714 is about 921.0588446885.

The spelling of 781379714 in words is "seven hundred eighty-one million, three hundred seventy-nine thousand, seven hundred fourteen".