72423432197 has 2 divisors, whose sum is σ = 72423432198. Its totient is φ = 72423432196.

The previous prime is 72423432091. The next prime is 72423432233. The reversal of 72423432197 is 79123432427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44605862401 + 27817569796 = 211201^2 + 166786^2 .

It is a cyclic number.

It is not a de Polignac number, because 72423432197 - 2¹⁰ = 72423431173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72423432397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36211716098 + 36211716099.

It is an arithmetic number, because the mean of its divisors is an integer number (36211716099).

Almost surely, 2^72423432197 is an apocalyptic number.

It is an amenable number.

72423432197 is a deficient number, since it is larger than the sum of its proper divisors (1).

72423432197 is an equidigital number, since it uses as much as digits as its factorization.

72423432197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 44.

The spelling of 72423432197 in words is "seventy-two billion, four hundred twenty-three million, four hundred thirty-two thousand, one hundred ninety-seven".