746655989 has 2 divisors, whose sum is σ = 746655990. Its totient is φ = 746655988.

The previous prime is 746655971. The next prime is 746655991. The reversal of 746655989 is 989556647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386908900 + 359747089 = 19670^2 + 18967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-746655989 is a prime.

It is a Sophie Germain prime.

Together with 746655991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (746655919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373327994 + 373327995.

It is an arithmetic number, because the mean of its divisors is an integer number (373327995).

Almost surely, 2^746655989 is an apocalyptic number.

It is an amenable number.

746655989 is a deficient number, since it is larger than the sum of its proper divisors (1).

746655989 is an equidigital number, since it uses as much as digits as its factorization.

746655989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 59.

The square root of 746655989 is about 27325.0066605664. The cubic root of 746655989 is about 907.2079575930.

The spelling of 746655989 in words is "seven hundred forty-six million, six hundred fifty-five thousand, nine hundred eighty-nine".