726587081 has 4 divisors (see below), whose sum is σ = 792640464. Its totient is φ = 660533700.

The previous prime is 726587077. The next prime is 726587101. The reversal of 726587081 is 180785627.

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 726587081 - 2² = 726587077 is a prime.

It is a super-2 number, since 2×726587081² = 1055857572552201122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (726587681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33026675 + ... + 33026696.

It is an arithmetic number, because the mean of its divisors is an integer number (198160116).

Almost surely, 2^726587081 is an apocalyptic number.

It is an amenable number.

726587081 is a deficient number, since it is larger than the sum of its proper divisors (66053383).

726587081 is a wasteful number, since it uses less digits than its factorization.

726587081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66053382.

The product of its (nonzero) digits is 188160, while the sum is 44.

The square root of 726587081 is about 26955.2792788352. The cubic root of 726587081 is about 899.0059316536.

The spelling of 726587081 in words is "seven hundred twenty-six million, five hundred eighty-seven thousand, eighty-one".