1553352989 has 2 divisors, whose sum is σ = 1553352990. Its totient is φ = 1553352988.

The previous prime is 1553352979. The next prime is 1553353049. The reversal of 1553352989 is 9892533551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1525527364 + 27825625 = 39058^2 + 5275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1553352989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1553352949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776676494 + 776676495.

It is an arithmetic number, because the mean of its divisors is an integer number (776676495).

Almost surely, 2^1553352989 is an apocalyptic number.

It is an amenable number.

1553352989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553352989 is an equidigital number, since it uses as much as digits as its factorization.

1553352989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458000, while the sum is 50.

The square root of 1553352989 is about 39412.5993687298. The cubic root of 1553352989 is about 1158.1284199789.

The spelling of 1553352989 in words is "one billion, five hundred fifty-three million, three hundred fifty-two thousand, nine hundred eighty-nine".