102403949 has 4 divisors (see below), whose sum is σ = 102923964. Its totient is φ = 101883936.

The previous prime is 102403927. The next prime is 102403957. The reversal of 102403949 is 949304201.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53655625 + 48748324 = 7325^2 + 6982^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102403949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102403909) 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, 259712 + ... + 260105.

It is an arithmetic number, because the mean of its divisors is an integer number (25730991).

Almost surely, 2^102403949 is an apocalyptic number.

It is an amenable number.

102403949 is a deficient number, since it is larger than the sum of its proper divisors (520015).

102403949 is an equidigital number, since it uses as much as digits as its factorization.

102403949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520014.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 102403949 is about 10119.4836330714. The cubic root of 102403949 is about 467.8488520712.

The spelling of 102403949 in words is "one hundred two million, four hundred three thousand, nine hundred forty-nine".