30661739 has 2 divisors, whose sum is σ = 30661740. Its totient is φ = 30661738.

The previous prime is 30661733. The next prime is 30661747. The reversal of 30661739 is 93716603.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30661739 - 2²⁰ = 29613163 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30661699 and 30661708.

It is not a weakly prime, because it can be changed into another prime (30661733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15330869 + 15330870.

It is an arithmetic number, because the mean of its divisors is an integer number (15330870).

Almost surely, 2^30661739 is an apocalyptic number.

30661739 is a deficient number, since it is larger than the sum of its proper divisors (1).

30661739 is an equidigital number, since it uses as much as digits as its factorization.

30661739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 30661739 is about 5537.3043080546. The cubic root of 30661739 is about 312.9912963246.

The spelling of 30661739 in words is "thirty million, six hundred sixty-one thousand, seven hundred thirty-nine".