149930809621 has 2 divisors, whose sum is σ = 149930809622. Its totient is φ = 149930809620.

The previous prime is 149930809603. The next prime is 149930809627. The reversal of 149930809621 is 126908039941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79628938596 + 70301871025 = 282186^2 + 265145^2 .

It is a cyclic number.

It is not a de Polignac number, because 149930809621 - 2¹⁷ = 149930678549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149930809627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74965404810 + 74965404811.

It is an arithmetic number, because the mean of its divisors is an integer number (74965404811).

Almost surely, 2^149930809621 is an apocalyptic number.

It is an amenable number.

149930809621 is a deficient number, since it is larger than the sum of its proper divisors (1).

149930809621 is an equidigital number, since it uses as much as digits as its factorization.

149930809621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 149930809621 in words is "one hundred forty-nine billion, nine hundred thirty million, eight hundred nine thousand, six hundred twenty-one".