1104157661 has 2 divisors, whose sum is σ = 1104157662. Its totient is φ = 1104157660.

The previous prime is 1104157643. The next prime is 1104157709. The reversal of 1104157661 is 1667514011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 858138436 + 246019225 = 29294^2 + 15685^2 .

It is an emirp because it is prime and its reverse (1667514011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1104157661 - 2³⁰ = 30415837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1104157601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552078830 + 552078831.

It is an arithmetic number, because the mean of its divisors is an integer number (552078831).

Almost surely, 2^1104157661 is an apocalyptic number.

It is an amenable number.

1104157661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1104157661 is an equidigital number, since it uses as much as digits as its factorization.

1104157661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1104157661 is about 33228.8678862221. The cubic root of 1104157661 is about 1033.5790472099.

The spelling of 1104157661 in words is "one billion, one hundred four million, one hundred fifty-seven thousand, six hundred sixty-one".