275397973 has 2 divisors, whose sum is σ = 275397974. Its totient is φ = 275397972.

The previous prime is 275397961. The next prime is 275397979. The reversal of 275397973 is 379793572.

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., 250177489 + 25220484 = 15817^2 + 5022^2 .

It is a cyclic number.

It is not a de Polignac number, because 275397973 - 2²¹ = 273300821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 275397973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275397979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137698986 + 137698987.

It is an arithmetic number, because the mean of its divisors is an integer number (137698987).

Almost surely, 2^275397973 is an apocalyptic number.

It is an amenable number.

275397973 is a deficient number, since it is larger than the sum of its proper divisors (1).

275397973 is an equidigital number, since it uses as much as digits as its factorization.

275397973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2500470, while the sum is 52.

The square root of 275397973 is about 16595.1189510651. The cubic root of 275397973 is about 650.6092693617.

The spelling of 275397973 in words is "two hundred seventy-five million, three hundred ninety-seven thousand, nine hundred seventy-three".