153549989 has 2 divisors, whose sum is σ = 153549990. Its totient is φ = 153549988.

The previous prime is 153549973. The next prime is 153550073. The reversal of 153549989 is 989945351.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151044100 + 2505889 = 12290^2 + 1583^2 .

It is a cyclic number.

It is not a de Polignac number, because 153549989 - 2⁴ = 153549973 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 153549989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153509989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76774994 + 76774995.

It is an arithmetic number, because the mean of its divisors is an integer number (76774995).

Almost surely, 2^153549989 is an apocalyptic number.

It is an amenable number.

153549989 is a deficient number, since it is larger than the sum of its proper divisors (1).

153549989 is an equidigital number, since it uses as much as digits as its factorization.

153549989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 53.

The square root of 153549989 is about 12391.5289210008. The cubic root of 153549989 is about 535.4882304730.

The spelling of 153549989 in words is "one hundred fifty-three million, five hundred forty-nine thousand, nine hundred eighty-nine".