28941963131 has 2 divisors, whose sum is σ = 28941963132. Its totient is φ = 28941963130.

The previous prime is 28941963109. The next prime is 28941963137. The reversal of 28941963131 is 13136914982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28941963131 is a prime.

It is a super-2 number, since 2×28941963131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28941963137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14470981565 + 14470981566.

It is an arithmetic number, because the mean of its divisors is an integer number (14470981566).

Almost surely, 2^28941963131 is an apocalyptic number.

28941963131 is a deficient number, since it is larger than the sum of its proper divisors (1).

28941963131 is an equidigital number, since it uses as much as digits as its factorization.

28941963131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The spelling of 28941963131 in words is "twenty-eight billion, nine hundred forty-one million, nine hundred sixty-three thousand, one hundred thirty-one".