235972813 has 2 divisors, whose sum is σ = 235972814. Its totient is φ = 235972812.

The previous prime is 235972783. The next prime is 235972817. The reversal of 235972813 is 318279532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187224489 + 48748324 = 13683^2 + 6982^2 .

It is a cyclic number.

It is not a de Polignac number, because 235972813 - 2⁹ = 235972301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235972817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117986406 + 117986407.

It is an arithmetic number, because the mean of its divisors is an integer number (117986407).

Almost surely, 2^235972813 is an apocalyptic number.

It is an amenable number.

235972813 is a deficient number, since it is larger than the sum of its proper divisors (1).

235972813 is an equidigital number, since it uses as much as digits as its factorization.

235972813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 235972813 is about 15361.4066087712. The cubic root of 235972813 is about 617.9509296229.

The spelling of 235972813 in words is "two hundred thirty-five million, nine hundred seventy-two thousand, eight hundred thirteen".