781084012 has 6 divisors (see below), whose sum is σ = 1366897028. Its totient is φ = 390542004.

The previous prime is 781084009. The next prime is 781084019. The reversal of 781084012 is 210480187.

It is a super-2 number, since 2×781084012² = 1220184467604032288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781084019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97635498 + ... + 97635505.

Almost surely, 2^781084012 is an apocalyptic number.

It is an amenable number.

781084012 is a deficient number, since it is larger than the sum of its proper divisors (585813016).

781084012 is a wasteful number, since it uses less digits than its factorization.

781084012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195271007 (or 195271005 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 781084012 is about 27947.8802774021. The cubic root of 781084012 is about 920.9426428379.

The spelling of 781084012 in words is "seven hundred eighty-one million, eighty-four thousand, twelve".