30641861 has 2 divisors, whose sum is σ = 30641862. Its totient is φ = 30641860.

The previous prime is 30641833. The next prime is 30641887. The reversal of 30641861 is 16814603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20079361 + 10562500 = 4481^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 30641861 - 2⁶ = 30641797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30641461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15320930 + 15320931.

It is an arithmetic number, because the mean of its divisors is an integer number (15320931).

Almost surely, 2^30641861 is an apocalyptic number.

It is an amenable number.

30641861 is a deficient number, since it is larger than the sum of its proper divisors (1).

30641861 is an equidigital number, since it uses as much as digits as its factorization.

30641861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 30641861 is about 5535.5091003448. The cubic root of 30641861 is about 312.9236443021.

The spelling of 30641861 in words is "thirty million, six hundred forty-one thousand, eight hundred sixty-one".