149723592509 has 2 divisors, whose sum is σ = 149723592510. Its totient is φ = 149723592508.

The previous prime is 149723592493. The next prime is 149723592617. The reversal of 149723592509 is 905295327941.

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., 104407826884 + 45315765625 = 323122^2 + 212875^2 .

It is an emirp because it is prime and its reverse (905295327941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149723592509 - 2⁴ = 149723592493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149723598509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74861796254 + 74861796255.

It is an arithmetic number, because the mean of its divisors is an integer number (74861796255).

Almost surely, 2^149723592509 is an apocalyptic number.

It is an amenable number.

149723592509 is a deficient number, since it is larger than the sum of its proper divisors (1).

149723592509 is an equidigital number, since it uses as much as digits as its factorization.

149723592509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6123600, while the sum is 56.

The spelling of 149723592509 in words is "one hundred forty-nine billion, seven hundred twenty-three million, five hundred ninety-two thousand, five hundred nine".