72989497853 has 2 divisors, whose sum is σ = 72989497854. Its totient is φ = 72989497852.

The previous prime is 72989497837. The next prime is 72989497859. The reversal of 72989497853 is 35879498927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36935842969 + 36053654884 = 192187^2 + 189878^2 .

It is a cyclic number.

It is not a de Polignac number, because 72989497853 - 2⁴ = 72989497837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72989497859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36494748926 + 36494748927.

It is an arithmetic number, because the mean of its divisors is an integer number (36494748927).

Almost surely, 2^72989497853 is an apocalyptic number.

It is an amenable number.

72989497853 is a deficient number, since it is larger than the sum of its proper divisors (1).

72989497853 is an equidigital number, since it uses as much as digits as its factorization.

72989497853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 274337280, while the sum is 71.

The spelling of 72989497853 in words is "seventy-two billion, nine hundred eighty-nine million, four hundred ninety-seven thousand, eight hundred fifty-three".