246645389 has 2 divisors, whose sum is σ = 246645390. Its totient is φ = 246645388.

The previous prime is 246645361. The next prime is 246645391. The reversal of 246645389 is 983546642.

246645389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245956489 + 688900 = 15683^2 + 830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-246645389 is a prime.

It is a super-2 number, since 2×246645389² = 121667895829922642, which contains 22 as substring.

Together with 246645391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (246644389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123322694 + 123322695.

It is an arithmetic number, because the mean of its divisors is an integer number (123322695).

Almost surely, 2^246645389 is an apocalyptic number.

It is an amenable number.

246645389 is a deficient number, since it is larger than the sum of its proper divisors (1).

246645389 is an equidigital number, since it uses as much as digits as its factorization.

246645389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 47.

The square root of 246645389 is about 15704.9479145905. The cubic root of 246645389 is about 627.1301304365.

The spelling of 246645389 in words is "two hundred forty-six million, six hundred forty-five thousand, three hundred eighty-nine".