920213237 has 2 divisors, whose sum is σ = 920213238. Its totient is φ = 920213236.

The previous prime is 920213209. The next prime is 920213311. The reversal of 920213237 is 732312029.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 918938596 + 1274641 = 30314^2 + 1129^2 .

It is a cyclic number.

It is not a de Polignac number, because 920213237 - 2⁸ = 920212981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (920210237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460106618 + 460106619.

It is an arithmetic number, because the mean of its divisors is an integer number (460106619).

Almost surely, 2^920213237 is an apocalyptic number.

It is an amenable number.

920213237 is a deficient number, since it is larger than the sum of its proper divisors (1).

920213237 is an equidigital number, since it uses as much as digits as its factorization.

920213237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 920213237 is about 30335.0166803976. The cubic root of 920213237 is about 972.6639624154.

The spelling of 920213237 in words is "nine hundred twenty million, two hundred thirteen thousand, two hundred thirty-seven".