102115397 has 2 divisors, whose sum is σ = 102115398. Its totient is φ = 102115396.

The previous prime is 102115369. The next prime is 102115427. The reversal of 102115397 is 793511201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95140516 + 6974881 = 9754^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 102115397 - 2¹⁴ = 102099013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102115327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51057698 + 51057699.

It is an arithmetic number, because the mean of its divisors is an integer number (51057699).

Almost surely, 2^102115397 is an apocalyptic number.

It is an amenable number.

102115397 is a deficient number, since it is larger than the sum of its proper divisors (1).

102115397 is an equidigital number, since it uses as much as digits as its factorization.

102115397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 102115397 is about 10105.2163262347. The cubic root of 102115397 is about 467.4090066643.

Adding to 102115397 its reverse (793511201), we get a palindrome (895626598).

The spelling of 102115397 in words is "one hundred two million, one hundred fifteen thousand, three hundred ninety-seven".