1630541497 has 4 divisors (see below), whose sum is σ = 1755967780. Its totient is φ = 1505115216.

The previous prime is 1630541477. The next prime is 1630541509. The reversal of 1630541497 is 7941450361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7941450361 = 13 ⋅610880797.

It can be written as a sum of positive squares in 2 ways, for example, as 493772841 + 1136768656 = 22221^2 + 33716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630541497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630541477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62713122 + ... + 62713147.

It is an arithmetic number, because the mean of its divisors is an integer number (438991945).

Almost surely, 2^1630541497 is an apocalyptic number.

It is an amenable number.

1630541497 is a deficient number, since it is larger than the sum of its proper divisors (125426283).

1630541497 is a wasteful number, since it uses less digits than its factorization.

1630541497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125426282.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1630541497 is about 40379.9640539711. The cubic root of 1630541497 is about 1177.0022290692.

The spelling of 1630541497 in words is "one billion, six hundred thirty million, five hundred forty-one thousand, four hundred ninety-seven".