2784989531 has 2 divisors, whose sum is σ = 2784989532. Its totient is φ = 2784989530.

The previous prime is 2784989503. The next prime is 2784989551. The reversal of 2784989531 is 1359894872.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2784989531 is a prime.

It is a super-2 number, since 2×2784989531² = 15512333375559199922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2784989551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392494765 + 1392494766.

It is an arithmetic number, because the mean of its divisors is an integer number (1392494766).

Almost surely, 2^2784989531 is an apocalyptic number.

2784989531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2784989531 is an equidigital number, since it uses as much as digits as its factorization.

2784989531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 56.

The square root of 2784989531 is about 52773.0000189491. Note that the first 4 decimals coincide. The cubic root of 2784989531 is about 1406.9365832065.

The spelling of 2784989531 in words is "two billion, seven hundred eighty-four million, nine hundred eighty-nine thousand, five hundred thirty-one".