30706631 has 2 divisors, whose sum is σ = 30706632. Its totient is φ = 30706630.

The previous prime is 30706579. The next prime is 30706657. The reversal of 30706631 is 13660703.

It is an a-pointer prime, because the next prime (30706657) can be obtained adding 30706631 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30706631 - 2¹⁰ = 30705607 is a prime.

It is a super-2 number, since 2×30706631² = 1885794374740322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30706631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30706231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15353315 + 15353316.

It is an arithmetic number, because the mean of its divisors is an integer number (15353316).

Almost surely, 2^30706631 is an apocalyptic number.

30706631 is a deficient number, since it is larger than the sum of its proper divisors (1).

30706631 is an equidigital number, since it uses as much as digits as its factorization.

30706631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 30706631 is about 5541.3564223933. The cubic root of 30706631 is about 313.1439725265.

The spelling of 30706631 in words is "thirty million, seven hundred six thousand, six hundred thirty-one".