1369089581 has 8 divisors (see below), whose sum is σ = 1396734840. Its totient is φ = 1341716992.

The previous prime is 1369089571. The next prime is 1369089607. The reversal of 1369089581 is 1859809631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48930025 + 1320159556 = 6995^2 + 36334^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1369089581 is a prime.

It is a super-2 number, since 2×1369089581² = 3748812561605511122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369089511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58010 + ... + 78123.

It is an arithmetic number, because the mean of its divisors is an integer number (174591855).

Almost surely, 2^1369089581 is an apocalyptic number.

It is an amenable number.

1369089581 is a deficient number, since it is larger than the sum of its proper divisors (27645259).

1369089581 is a wasteful number, since it uses less digits than its factorization.

1369089581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136335.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 1369089581 is about 37001.2105342514. The cubic root of 1369089581 is about 1110.3944654873.

The spelling of 1369089581 in words is "one billion, three hundred sixty-nine million, eighty-nine thousand, five hundred eighty-one".