428703131 has 2 divisors, whose sum is σ = 428703132. Its totient is φ = 428703130.

The previous prime is 428703083. The next prime is 428703139. The reversal of 428703131 is 131307824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428703131 is a prime.

It is a super-2 number, since 2×428703131² = 367572749058406322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 428703094 and 428703103.

It is not a weakly prime, because it can be changed into another prime (428703139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214351565 + 214351566.

It is an arithmetic number, because the mean of its divisors is an integer number (214351566).

Almost surely, 2^428703131 is an apocalyptic number.

428703131 is a deficient number, since it is larger than the sum of its proper divisors (1).

428703131 is an equidigital number, since it uses as much as digits as its factorization.

428703131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 428703131 is about 20705.1474517812. The cubic root of 428703131 is about 754.0246639930.

The spelling of 428703131 in words is "four hundred twenty-eight million, seven hundred three thousand, one hundred thirty-one".