1365553493 has 8 divisors (see below), whose sum is σ = 1425427200. Its totient is φ = 1305721648.

The previous prime is 1365553481. The next prime is 1365553513. The reversal of 1365553493 is 3943555631.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1365553493 - 2⁶ = 1365553429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1365453493) 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, 69188 + ... + 86706.

It is an arithmetic number, because the mean of its divisors is an integer number (178178400).

Almost surely, 2^1365553493 is an apocalyptic number.

It is an amenable number.

1365553493 is a deficient number, since it is larger than the sum of its proper divisors (59873707).

1365553493 is a wasteful number, since it uses less digits than its factorization.

1365553493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20931.

The product of its digits is 729000, while the sum is 44.

The square root of 1365553493 is about 36953.3962309285. The cubic root of 1365553493 is about 1109.4376647356.

The spelling of 1365553493 in words is "one billion, three hundred sixty-five million, five hundred fifty-three thousand, four hundred ninety-three".