1128294731 has 2 divisors, whose sum is σ = 1128294732. Its totient is φ = 1128294730.

The previous prime is 1128294707. The next prime is 1128294733. The reversal of 1128294731 is 1374928211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1128294731 - 2⁶ = 1128294667 is a prime.

It is a super-2 number, since 2×1128294731² = 2546098000004724722, which contains 22 as substring.

Together with 1128294733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1128294733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564147365 + 564147366.

It is an arithmetic number, because the mean of its divisors is an integer number (564147366).

Almost surely, 2^1128294731 is an apocalyptic number.

1128294731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128294731 is an equidigital number, since it uses as much as digits as its factorization.

1128294731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 1128294731 is about 33590.0987048267. The cubic root of 1128294731 is about 1041.0562281477.

The spelling of 1128294731 in words is "one billion, one hundred twenty-eight million, two hundred ninety-four thousand, seven hundred thirty-one".