1355642989 has 8 divisors (see below), whose sum is σ = 1473025280. Its totient is φ = 1242864000.

The previous prime is 1355642987. The next prime is 1355642999. The reversal of 1355642989 is 9892465531.

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 1355642989 - 2¹ = 1355642987 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 (1355642987) 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, 1150212 + ... + 1151389.

It is an arithmetic number, because the mean of its divisors is an integer number (184128160).

Almost surely, 2^1355642989 is an apocalyptic number.

1355642989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1355642989 is a deficient number, since it is larger than the sum of its proper divisors (117382291).

1355642989 is a wasteful number, since it uses less digits than its factorization.

1355642989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301651.

The product of its digits is 2332800, while the sum is 52.

The square root of 1355642989 is about 36819.0574159633. The cubic root of 1355642989 is about 1106.7472311048.

The spelling of 1355642989 in words is "one billion, three hundred fifty-five million, six hundred forty-two thousand, nine hundred eighty-nine".