1497830191961 has 2 divisors, whose sum is σ = 1497830191962. Its totient is φ = 1497830191960.

The previous prime is 1497830191951. The next prime is 1497830192081. The reversal of 1497830191961 is 1691910387941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 822177427600 + 675652764361 = 906740^2 + 821981^2 .

It is an emirp because it is prime and its reverse (1691910387941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1497830191961 - 2¹⁰ = 1497830190937 is a prime.

It is a super-2 number, since 2×1497830191961² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1497830191961.

It is not a weakly prime, because it can be changed into another prime (1497830191931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 748915095980 + 748915095981.

It is an arithmetic number, because the mean of its divisors is an integer number (748915095981).

Almost surely, 2^{1497830191961} is an apocalyptic number.

It is an amenable number.

1497830191961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1497830191961 is an equidigital number, since it uses as much as digits as its factorization.

1497830191961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The spelling of 1497830191961 in words is "one trillion, four hundred ninety-seven billion, eight hundred thirty million, one hundred ninety-one thousand, nine hundred sixty-one".