726685877 has 2 divisors, whose sum is σ = 726685878. Its totient is φ = 726685876.

The previous prime is 726685829. The next prime is 726685891. The reversal of 726685877 is 778586627.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 726356401 + 329476 = 26951^2 + 574^2 .

It is a cyclic number.

It is not a de Polignac number, because 726685877 - 2²² = 722491573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726685177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363342938 + 363342939.

It is an arithmetic number, because the mean of its divisors is an integer number (363342939).

Almost surely, 2^726685877 is an apocalyptic number.

It is an amenable number.

726685877 is a deficient number, since it is larger than the sum of its proper divisors (1).

726685877 is an equidigital number, since it uses as much as digits as its factorization.

726685877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7902720, while the sum is 56.

The square root of 726685877 is about 26957.1118074619. Note that the first 3 decimals coincide. The cubic root of 726685877 is about 899.0466765586.

The spelling of 726685877 in words is "seven hundred twenty-six million, six hundred eighty-five thousand, eight hundred seventy-seven".