146561813 has 2 divisors, whose sum is σ = 146561814. Its totient is φ = 146561812.

The previous prime is 146561809. The next prime is 146561837. The reversal of 146561813 is 318165641.

146561813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86452804 + 60109009 = 9298^2 + 7753^2 .

It is a cyclic number.

It is not a de Polignac number, because 146561813 - 2² = 146561809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146561803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73280906 + 73280907.

It is an arithmetic number, because the mean of its divisors is an integer number (73280907).

Almost surely, 2^146561813 is an apocalyptic number.

It is an amenable number.

146561813 is a deficient number, since it is larger than the sum of its proper divisors (1).

146561813 is an equidigital number, since it uses as much as digits as its factorization.

146561813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 146561813 is about 12106.2716391133. The cubic root of 146561813 is about 527.2382901004.

The spelling of 146561813 in words is "one hundred forty-six million, five hundred sixty-one thousand, eight hundred thirteen".