652002161 has 2 divisors, whose sum is σ = 652002162. Its totient is φ = 652002160.

The previous prime is 652002133. The next prime is 652002179. The reversal of 652002161 is 161200256.

652002161 = 18055² + 18056².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326019136 + 325983025 = 18056^2 + 18055^2 .

It is a cyclic number.

It is not a de Polignac number, because 652002161 - 2²⁶ = 584893297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (652002121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326001080 + 326001081.

It is an arithmetic number, because the mean of its divisors is an integer number (326001081).

Almost surely, 2^652002161 is an apocalyptic number.

652002161 is the 18056-th centered square number.

It is an amenable number.

652002161 is a deficient number, since it is larger than the sum of its proper divisors (1).

652002161 is an equidigital number, since it uses as much as digits as its factorization.

652002161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 652002161 is about 25534.3329852182. The cubic root of 652002161 is about 867.1276040341.

The spelling of 652002161 in words is "six hundred fifty-two million, two thousand, one hundred sixty-one".