2145117497 has 2 divisors, whose sum is σ = 2145117498. Its totient is φ = 2145117496.

The previous prime is 2145117473. The next prime is 2145117523. The reversal of 2145117497 is 7947115412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1679032576 + 466084921 = 40976^2 + 21589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145117497 - 2¹⁸ = 2144855353 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145117467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072558748 + 1072558749.

It is an arithmetic number, because the mean of its divisors is an integer number (1072558749).

Almost surely, 2^2145117497 is an apocalyptic number.

It is an amenable number.

2145117497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145117497 is an equidigital number, since it uses as much as digits as its factorization.

2145117497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 2145117497 is about 46315.4131688361. The cubic root of 2145117497 is about 1289.6851377855.

The spelling of 2145117497 in words is "two billion, one hundred forty-five million, one hundred seventeen thousand, four hundred ninety-seven".