845975401 has 2 divisors, whose sum is σ = 845975402. Its totient is φ = 845975400.

The previous prime is 845975387. The next prime is 845975447. The reversal of 845975401 is 104579548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647193600 + 198781801 = 25440^2 + 14099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845975401 is a prime.

It is a super-2 number, since 2×845975401² = 1431348758194221602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (845985401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422987700 + 422987701.

It is an arithmetic number, because the mean of its divisors is an integer number (422987701).

Almost surely, 2^845975401 is an apocalyptic number.

It is an amenable number.

845975401 is a deficient number, since it is larger than the sum of its proper divisors (1).

845975401 is an equidigital number, since it uses as much as digits as its factorization.

845975401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 845975401 is about 29085.6562759034. The cubic root of 845975401 is about 945.7708224212.

It can be divided in two parts, 84597 and 5401, that added together give a palindrome (89998).

The spelling of 845975401 in words is "eight hundred forty-five million, nine hundred seventy-five thousand, four hundred one".