102781403 has 4 divisors (see below), whose sum is σ = 103163760. Its totient is φ = 102399048.

The previous prime is 102781391. The next prime is 102781409. The reversal of 102781403 is 304187201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102781403 - 2⁴ = 102781387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102781409) 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, 190775 + ... + 191312.

It is an arithmetic number, because the mean of its divisors is an integer number (25790940).

Almost surely, 2^102781403 is an apocalyptic number.

102781403 is a deficient number, since it is larger than the sum of its proper divisors (382357).

102781403 is an equidigital number, since it uses as much as digits as its factorization.

102781403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382356.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 102781403 is about 10138.1163437791. The cubic root of 102781403 is about 468.4229669614.

The spelling of 102781403 in words is "one hundred two million, seven hundred eighty-one thousand, four hundred three".