102319897 has 2 divisors, whose sum is σ = 102319898. Its totient is φ = 102319896.

The previous prime is 102319873. The next prime is 102319901. The reversal of 102319897 is 798913201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61921161 + 40398736 = 7869^2 + 6356^2 .

It is an emirp because it is prime and its reverse (798913201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102319897 - 2²³ = 93931289 is a prime.

It is a super-2 number, since 2×102319897² = 20938722644181218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102319817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51159948 + 51159949.

It is an arithmetic number, because the mean of its divisors is an integer number (51159949).

Almost surely, 2^102319897 is an apocalyptic number.

It is an amenable number.

102319897 is a deficient number, since it is larger than the sum of its proper divisors (1).

102319897 is an equidigital number, since it uses as much as digits as its factorization.

102319897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 102319897 is about 10115.3298018404. The cubic root of 102319897 is about 467.7208153571.

The spelling of 102319897 in words is "one hundred two million, three hundred nineteen thousand, eight hundred ninety-seven".