273428989 has 2 divisors, whose sum is σ = 273428990. Its totient is φ = 273428988.

The previous prime is 273428957. The next prime is 273428993. The reversal of 273428989 is 989824372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172265625 + 101163364 = 13125^2 + 10058^2 .

It is a cyclic number.

It is not a de Polignac number, because 273428989 - 2⁵ = 273428957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (273428999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136714494 + 136714495.

It is an arithmetic number, because the mean of its divisors is an integer number (136714495).

Almost surely, 2^273428989 is an apocalyptic number.

It is an amenable number.

273428989 is a deficient number, since it is larger than the sum of its proper divisors (1).

273428989 is an equidigital number, since it uses as much as digits as its factorization.

273428989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The square root of 273428989 is about 16535.6883437007. The cubic root of 273428989 is about 649.0550284417.

The spelling of 273428989 in words is "two hundred seventy-three million, four hundred twenty-eight thousand, nine hundred eighty-nine".