613700161 has 2 divisors, whose sum is σ = 613700162. Its totient is φ = 613700160.

The previous prime is 613700147. The next prime is 613700179. The reversal of 613700161 is 161007316.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375584400 + 238115761 = 19380^2 + 15431^2 .

It is a cyclic number.

It is not a de Polignac number, because 613700161 - 2⁷ = 613700033 is a prime.

It is a super-2 number, since 2×613700161² = 753255775222851842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (613700141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306850080 + 306850081.

It is an arithmetic number, because the mean of its divisors is an integer number (306850081).

Almost surely, 2^613700161 is an apocalyptic number.

It is an amenable number.

613700161 is a deficient number, since it is larger than the sum of its proper divisors (1).

613700161 is an equidigital number, since it uses as much as digits as its factorization.

613700161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 613700161 is about 24772.9723892794. The cubic root of 613700161 is about 849.8039506332.

Adding to 613700161 its reverse (161007316), we get a palindrome (774707477).

The spelling of 613700161 in words is "six hundred thirteen million, seven hundred thousand, one hundred sixty-one".