1128698651 has 4 divisors (see below), whose sum is σ = 1128767112. Its totient is φ = 1128630192.

The previous prime is 1128698639. The next prime is 1128698687. The reversal of 1128698651 is 1568968211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1568968211 = 6203 ⋅252937.

It is a cyclic number.

It is not a de Polignac number, because 1128698651 - 2⁶ = 1128698587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1128698596 and 1128698605.

It is not an unprimeable number, because it can be changed into a prime (1128698611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7280 + ... + 48066.

It is an arithmetic number, because the mean of its divisors is an integer number (282191778).

Almost surely, 2^1128698651 is an apocalyptic number.

1128698651 is a deficient number, since it is larger than the sum of its proper divisors (68461).

1128698651 is an equidigital number, since it uses as much as digits as its factorization.

1128698651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68460.

The product of its digits is 207360, while the sum is 47.

The square root of 1128698651 is about 33596.1106528717. The cubic root of 1128698651 is about 1041.1804431101.

The spelling of 1128698651 in words is "one billion, one hundred twenty-eight million, six hundred ninety-eight thousand, six hundred fifty-one".