30725400073 has 2 divisors, whose sum is σ = 30725400074. Its totient is φ = 30725400072.

The previous prime is 30725400071. The next prime is 30725400077. The reversal of 30725400073 is 37000452703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30704851984 + 20548089 = 175228^2 + 4533^2 .

It is a cyclic number.

It is not a de Polignac number, because 30725400073 - 2¹ = 30725400071 is a prime.

Together with 30725400071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30725400071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15362700036 + 15362700037.

It is an arithmetic number, because the mean of its divisors is an integer number (15362700037).

Almost surely, 2^30725400073 is an apocalyptic number.

It is an amenable number.

30725400073 is a deficient number, since it is larger than the sum of its proper divisors (1).

30725400073 is an equidigital number, since it uses as much as digits as its factorization.

30725400073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 31.

Adding to 30725400073 its reverse (37000452703), we get a palindrome (67725852776).

The spelling of 30725400073 in words is "thirty billion, seven hundred twenty-five million, four hundred thousand, seventy-three".