1357823989 has 2 divisors, whose sum is σ = 1357823990. Its totient is φ = 1357823988.

The previous prime is 1357823977. The next prime is 1357824001. The reversal of 1357823989 is 9893287531.

It is a balanced prime because it is at equal distance from previous prime (1357823977) and next prime (1357824001).

It can be written as a sum of positive squares in only one way, i.e., 1027202500 + 330621489 = 32050^2 + 18183^2 .

It is an emirp because it is prime and its reverse (9893287531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1357823989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1357823939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678911994 + 678911995.

It is an arithmetic number, because the mean of its divisors is an integer number (678911995).

Almost surely, 2^1357823989 is an apocalyptic number.

It is an amenable number.

1357823989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1357823989 is an equidigital number, since it uses as much as digits as its factorization.

1357823989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 55.

The square root of 1357823989 is about 36848.6633271819. The cubic root of 1357823989 is about 1107.3404360545.

The spelling of 1357823989 in words is "one billion, three hundred fifty-seven million, eight hundred twenty-three thousand, nine hundred eighty-nine".