711554989 has 4 divisors (see below), whose sum is σ = 712315324. Its totient is φ = 710794656.

The previous prime is 711554981. The next prime is 711554993. The reversal of 711554989 is 989455117.

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

It can be written as a sum of positive squares in 2 ways, for example, as 266766889 + 444788100 = 16333^2 + 21090^2 .

It is a cyclic number.

It is not a de Polignac number, because 711554989 - 2³ = 711554981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (711554981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378762 + ... + 380635.

It is an arithmetic number, because the mean of its divisors is an integer number (178078831).

Almost surely, 2^711554989 is an apocalyptic number.

It is an amenable number.

711554989 is a deficient number, since it is larger than the sum of its proper divisors (760335).

711554989 is an equidigital number, since it uses as much as digits as its factorization.

711554989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760334.

The product of its digits is 453600, while the sum is 49.

The square root of 711554989 is about 26674.9880787227. The cubic root of 711554989 is about 892.7629447009.

The spelling of 711554989 in words is "seven hundred eleven million, five hundred fifty-four thousand, nine hundred eighty-nine".