1646265097 has 2 divisors, whose sum is σ = 1646265098. Its totient is φ = 1646265096.

The previous prime is 1646264993. The next prime is 1646265113. The reversal of 1646265097 is 7905626461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1640331001 + 5934096 = 40501^2 + 2436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1646265097 - 2¹⁹ = 1645740809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1646265197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823132548 + 823132549.

It is an arithmetic number, because the mean of its divisors is an integer number (823132549).

Almost surely, 2^1646265097 is an apocalyptic number.

It is an amenable number.

1646265097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646265097 is an equidigital number, since it uses as much as digits as its factorization.

1646265097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 1646265097 is about 40574.1924996666. The cubic root of 1646265097 is about 1180.7734795220.

The spelling of 1646265097 in words is "one billion, six hundred forty-six million, two hundred sixty-five thousand, ninety-seven".