73157901989 has 2 divisors, whose sum is σ = 73157901990. Its totient is φ = 73157901988.

The previous prime is 73157901959. The next prime is 73157902003. The reversal of 73157901989 is 98910975137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72450873889 + 707028100 = 269167^2 + 26590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73157901989 is a prime.

It is a super-2 number, since 2×73157901989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73157901959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36578950994 + 36578950995.

It is an arithmetic number, because the mean of its divisors is an integer number (36578950995).

Almost surely, 2^73157901989 is an apocalyptic number.

It is an amenable number.

73157901989 is a deficient number, since it is larger than the sum of its proper divisors (1).

73157901989 is an equidigital number, since it uses as much as digits as its factorization.

73157901989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4286520, while the sum is 59.

The spelling of 73157901989 in words is "seventy-three billion, one hundred fifty-seven million, nine hundred one thousand, nine hundred eighty-nine".