1912137797 has 2 divisors, whose sum is σ = 1912137798. Its totient is φ = 1912137796.

The previous prime is 1912137791. The next prime is 1912137833. The reversal of 1912137797 is 7977312191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1599520036 + 312617761 = 39994^2 + 17681^2 .

It is an emirp because it is prime and its reverse (7977312191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1912137797 - 2¹⁰ = 1912136773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1912137791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956068898 + 956068899.

It is an arithmetic number, because the mean of its divisors is an integer number (956068899).

Almost surely, 2^1912137797 is an apocalyptic number.

It is an amenable number.

1912137797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912137797 is an equidigital number, since it uses as much as digits as its factorization.

1912137797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 166698, while the sum is 47.

The square root of 1912137797 is about 43727.9978617819. The cubic root of 1912137797 is about 1241.1941749862.

The spelling of 1912137797 in words is "one billion, nine hundred twelve million, one hundred thirty-seven thousand, seven hundred ninety-seven".