270129661 has 2 divisors, whose sum is σ = 270129662. Its totient is φ = 270129660.

The previous prime is 270129659. The next prime is 270129701. The reversal of 270129661 is 166921072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180069561 + 90060100 = 13419^2 + 9490^2 .

It is a cyclic number.

It is not a de Polignac number, because 270129661 - 2¹ = 270129659 is a prime.

Together with 270129659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (270129161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135064830 + 135064831.

It is an arithmetic number, because the mean of its divisors is an integer number (135064831).

Almost surely, 2^270129661 is an apocalyptic number.

It is an amenable number.

270129661 is a deficient number, since it is larger than the sum of its proper divisors (1).

270129661 is an equidigital number, since it uses as much as digits as its factorization.

270129661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 270129661 is about 16435.6217101757. The cubic root of 270129661 is about 646.4338519917.

The spelling of 270129661 in words is "two hundred seventy million, one hundred twenty-nine thousand, six hundred sixty-one".