395920237 has 2 divisors, whose sum is σ = 395920238. Its totient is φ = 395920236.

The previous prime is 395920171. The next prime is 395920243. The reversal of 395920237 is 732029593.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303491241 + 92428996 = 17421^2 + 9614^2 .

It is an emirp because it is prime and its reverse (732029593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 395920237 - 2¹⁵ = 395887469 is a prime.

It is a super-2 number, since 2×395920237² = 313505668132272338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 395920237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395920277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197960118 + 197960119.

It is an arithmetic number, because the mean of its divisors is an integer number (197960119).

Almost surely, 2^395920237 is an apocalyptic number.

It is an amenable number.

395920237 is a deficient number, since it is larger than the sum of its proper divisors (1).

395920237 is an equidigital number, since it uses as much as digits as its factorization.

395920237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 395920237 is about 19897.7445204224. The cubic root of 395920237 is about 734.2927387490.

The spelling of 395920237 in words is "three hundred ninety-five million, nine hundred twenty thousand, two hundred thirty-seven".