30723046537 has 2 divisors, whose sum is σ = 30723046538. Its totient is φ = 30723046536.

The previous prime is 30723046499. The next prime is 30723046573. The reversal of 30723046537 is 73564032703.

Together with next prime (30723046573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29112549376 + 1610497161 = 170624^2 + 40131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30723046537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30723046537.

It is not a weakly prime, because it can be changed into another prime (30723046337) 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 as a sum of consecutive naturals, namely, 15361523268 + 15361523269.

It is an arithmetic number, because the mean of its divisors is an integer number (15361523269).

Almost surely, 2^30723046537 is an apocalyptic number.

It is an amenable number.

30723046537 is a deficient number, since it is larger than the sum of its proper divisors (1).

30723046537 is an equidigital number, since it uses as much as digits as its factorization.

30723046537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 40.

The spelling of 30723046537 in words is "thirty billion, seven hundred twenty-three million, forty-six thousand, five hundred thirty-seven".