102023309 has 2 divisors, whose sum is σ = 102023310. Its totient is φ = 102023308.

The previous prime is 102023287. The next prime is 102023329. The reversal of 102023309 is 903320201.

It is an a-pointer prime, because the next prime (102023329) can be obtained adding 102023309 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90820900 + 11202409 = 9530^2 + 3347^2 .

It is a cyclic number.

It is not a de Polignac number, because 102023309 - 2¹² = 102019213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102023329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51011654 + 51011655.

It is an arithmetic number, because the mean of its divisors is an integer number (51011655).

Almost surely, 2^102023309 is an apocalyptic number.

It is an amenable number.

102023309 is a deficient number, since it is larger than the sum of its proper divisors (1).

102023309 is an equidigital number, since it uses as much as digits as its factorization.

102023309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 102023309 is about 10100.6588398975. The cubic root of 102023309 is about 467.2684607491.

The spelling of 102023309 in words is "one hundred two million, twenty-three thousand, three hundred nine".