1088631749 has 2 divisors, whose sum is σ = 1088631750. Its totient is φ = 1088631748.

The previous prime is 1088631727. The next prime is 1088631757. The reversal of 1088631749 is 9471368801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 853224100 + 235407649 = 29210^2 + 15343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1088631749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1088631769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544315874 + 544315875.

It is an arithmetic number, because the mean of its divisors is an integer number (544315875).

Almost surely, 2^1088631749 is an apocalyptic number.

It is an amenable number.

1088631749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1088631749 is an equidigital number, since it uses as much as digits as its factorization.

1088631749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 1088631749 is about 32994.4199676248. The cubic root of 1088631749 is about 1028.7116669337.

The spelling of 1088631749 in words is "one billion, eighty-eight million, six hundred thirty-one thousand, seven hundred forty-nine".