1801140637 has 2 divisors, whose sum is σ = 1801140638. Its totient is φ = 1801140636.

The previous prime is 1801140631. The next prime is 1801140707. The reversal of 1801140637 is 7360411081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1534994041 + 266146596 = 39179^2 + 16314^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801140637 - 2²⁷ = 1666922909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1801140599 and 1801140608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1801140631) 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, 900570318 + 900570319.

It is an arithmetic number, because the mean of its divisors is an integer number (900570319).

Almost surely, 2^1801140637 is an apocalyptic number.

It is an amenable number.

1801140637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801140637 is an equidigital number, since it uses as much as digits as its factorization.

1801140637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1801140637 is about 42439.8472782361. The cubic root of 1801140637 is about 1216.6972924382.

The spelling of 1801140637 in words is "one billion, eight hundred one million, one hundred forty thousand, six hundred thirty-seven".