891650127097 has 2 divisors, whose sum is σ = 891650127098. Its totient is φ = 891650127096.

The previous prime is 891650127091. The next prime is 891650127127. The reversal of 891650127097 is 790721056198.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 889203736576 + 2446390521 = 942976^2 + 49461^2 .

It is a cyclic number.

It is not a de Polignac number, because 891650127097 - 2³⁹ = 341894313209 is a prime.

It is not a weakly prime, because it can be changed into another prime (891650127091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445825063548 + 445825063549.

It is an arithmetic number, because the mean of its divisors is an integer number (445825063549).

Almost surely, 2^891650127097 is an apocalyptic number.

It is an amenable number.

891650127097 is a deficient number, since it is larger than the sum of its proper divisors (1).

891650127097 is an equidigital number, since it uses as much as digits as its factorization.

891650127097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 55.

The spelling of 891650127097 in words is "eight hundred ninety-one billion, six hundred fifty million, one hundred twenty-seven thousand, ninety-seven".