30506137 has 2 divisors, whose sum is σ = 30506138. Its totient is φ = 30506136.

The previous prime is 30506129. The next prime is 30506183. The reversal of 30506137 is 73160503.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16451136 + 14055001 = 4056^2 + 3749^2 .

It is a cyclic number.

It is not a de Polignac number, because 30506137 - 2³ = 30506129 is a prime.

It is not a weakly prime, because it can be changed into another prime (30506107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15253068 + 15253069.

It is an arithmetic number, because the mean of its divisors is an integer number (15253069).

Almost surely, 2^30506137 is an apocalyptic number.

It is an amenable number.

30506137 is a deficient number, since it is larger than the sum of its proper divisors (1).

30506137 is an equidigital number, since it uses as much as digits as its factorization.

30506137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 30506137 is about 5523.2360985205. The cubic root of 30506137 is about 312.4609427454.

The spelling of 30506137 in words is "thirty million, five hundred six thousand, one hundred thirty-seven".