1631190541 has 2 divisors, whose sum is σ = 1631190542. Its totient is φ = 1631190540.

The previous prime is 1631190529. The next prime is 1631190551. The reversal of 1631190541 is 1450911361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1413008100 + 218182441 = 37590^2 + 14771^2 .

It is an emirp because it is prime and its reverse (1450911361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1631190541 - 2¹³ = 1631182349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1631190551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815595270 + 815595271.

It is an arithmetic number, because the mean of its divisors is an integer number (815595271).

Almost surely, 2^1631190541 is an apocalyptic number.

It is an amenable number.

1631190541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631190541 is an equidigital number, since it uses as much as digits as its factorization.

1631190541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 1631190541 is about 40387.9999628603. Note that the first 4 decimals coincide. The cubic root of 1631190541 is about 1177.1583786054.

The spelling of 1631190541 in words is "one billion, six hundred thirty-one million, one hundred ninety thousand, five hundred forty-one".