727680919 has 6 divisors (see below), whose sum is σ = 846486024. Its totient is φ = 623726460.

The previous prime is 727680893. The next prime is 727680973. The reversal of 727680919 is 919086727.

It is a happy number.

It is not a de Polignac number, because 727680919 - 2¹⁷ = 727549847 is a prime.

It is a super-2 number, since 2×727680919² = 1059039039753369122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 14850631 = 727680919 / (7 + 2 + 7 + 6 + 8 + 0 + 9 + 1 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727680119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7425267 + ... + 7425364.

It is an arithmetic number, because the mean of its divisors is an integer number (141081004).

Almost surely, 2^727680919 is an apocalyptic number.

727680919 is a deficient number, since it is larger than the sum of its proper divisors (118805105).

727680919 is a wasteful number, since it uses less digits than its factorization.

727680919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14850645 (or 14850638 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 727680919 is about 26975.5615140816. The cubic root of 727680919 is about 899.4568405763.

The spelling of 727680919 in words is "seven hundred twenty-seven million, six hundred eighty thousand, nine hundred nineteen".