102145699 has 2 divisors, whose sum is σ = 102145700. Its totient is φ = 102145698.

The previous prime is 102145663. The next prime is 102145723. The reversal of 102145699 is 996541201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102145699 is a prime.

It is not a weakly prime, because it can be changed into another prime (102146699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51072849 + 51072850.

It is an arithmetic number, because the mean of its divisors is an integer number (51072850).

Almost surely, 2^102145699 is an apocalyptic number.

102145699 is a deficient number, since it is larger than the sum of its proper divisors (1).

102145699 is an equidigital number, since it uses as much as digits as its factorization.

102145699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 102145699 is about 10106.7155396795. The cubic root of 102145699 is about 467.4552354976.

The spelling of 102145699 in words is "one hundred two million, one hundred forty-five thousand, six hundred ninety-nine".