197920024129 has 4 divisors (see below), whose sum is σ = 198945516676. Its totient is φ = 196894531584.

The previous prime is 197920024109. The next prime is 197920024147. The reversal of 197920024129 is 921420029791.

197920024129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921420029791 = 17 ⋅54201178223.

It can be written as a sum of positive squares in 2 ways, for example, as 62660102400 + 135259921729 = 250320^2 + 367777^2 .

It is a cyclic number.

It is not a de Polignac number, because 197920024129 - 2¹⁷ = 197919893057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197920024109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512745984 + ... + 512746369.

It is an arithmetic number, because the mean of its divisors is an integer number (49736379169).

Almost surely, 2^197920024129 is an apocalyptic number.

It is an amenable number.

197920024129 is a deficient number, since it is larger than the sum of its proper divisors (1025492547).

197920024129 is a wasteful number, since it uses less digits than its factorization.

197920024129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025492546.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 197920024129 in words is "one hundred ninety-seven billion, nine hundred twenty million, twenty-four thousand, one hundred twenty-nine".