102509429 has 4 divisors (see below), whose sum is σ = 111828480. Its totient is φ = 93190380.

The previous prime is 102509387. The next prime is 102509431. The reversal of 102509429 is 924905201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 924905201 = 11 ⋅84082291.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102509429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102509395 and 102509404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102509479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4659509 + ... + 4659530.

It is an arithmetic number, because the mean of its divisors is an integer number (27957120).

Almost surely, 2^102509429 is an apocalyptic number.

It is an amenable number.

102509429 is a deficient number, since it is larger than the sum of its proper divisors (9319051).

102509429 is an equidigital number, since it uses as much as digits as its factorization.

102509429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319050.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 102509429 is about 10124.6940200680. The cubic root of 102509429 is about 468.0094310443.

The spelling of 102509429 in words is "one hundred two million, five hundred nine thousand, four hundred twenty-nine".