1045991237 has 2 divisors, whose sum is σ = 1045991238. Its totient is φ = 1045991236.

The previous prime is 1045991213. The next prime is 1045991267. The reversal of 1045991237 is 7321995401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1003559041 + 42432196 = 31679^2 + 6514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1045991237 - 2¹⁰ = 1045990213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1045991194 and 1045991203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1045991207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522995618 + 522995619.

It is an arithmetic number, because the mean of its divisors is an integer number (522995619).

Almost surely, 2^1045991237 is an apocalyptic number.

It is an amenable number.

1045991237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045991237 is an equidigital number, since it uses as much as digits as its factorization.

1045991237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 1045991237 is about 32341.7877829906. The cubic root of 1045991237 is about 1015.1012176314.

The spelling of 1045991237 in words is "one billion, forty-five million, nine hundred ninety-one thousand, two hundred thirty-seven".