662152409 has 2 divisors, whose sum is σ = 662152410. Its totient is φ = 662152408.

The previous prime is 662152391. The next prime is 662152411. The reversal of 662152409 is 904251266.

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., 646176400 + 15976009 = 25420^2 + 3997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662152409 is a prime.

Together with 662152411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (662152709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331076204 + 331076205.

It is an arithmetic number, because the mean of its divisors is an integer number (331076205).

Almost surely, 2^662152409 is an apocalyptic number.

It is an amenable number.

662152409 is a deficient number, since it is larger than the sum of its proper divisors (1).

662152409 is an equidigital number, since it uses as much as digits as its factorization.

662152409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 662152409 is about 25732.3222620890. The cubic root of 662152409 is about 871.6042136929.

The spelling of 662152409 in words is "six hundred sixty-two million, one hundred fifty-two thousand, four hundred nine".