1909846097 has 2 divisors, whose sum is σ = 1909846098. Its totient is φ = 1909846096.

The previous prime is 1909846087. The next prime is 1909846117. The reversal of 1909846097 is 7906489091.

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., 1841353921 + 68492176 = 42911^2 + 8276^2 .

It is an emirp because it is prime and its reverse (7906489091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1909846097 - 2¹⁰ = 1909845073 is a prime.

It is a super-2 number, since 2×1909846097² = 7295024228452266818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1909846087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954923048 + 954923049.

It is an arithmetic number, because the mean of its divisors is an integer number (954923049).

Almost surely, 2^1909846097 is an apocalyptic number.

It is an amenable number.

1909846097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1909846097 is an equidigital number, since it uses as much as digits as its factorization.

1909846097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 1909846097 is about 43701.7859703697. The cubic root of 1909846097 is about 1240.6981190692.

The spelling of 1909846097 in words is "one billion, nine hundred nine million, eight hundred forty-six thousand, ninety-seven".