30489733 has 2 divisors, whose sum is σ = 30489734. Its totient is φ = 30489732.

The previous prime is 30489731. The next prime is 30489749. The reversal of 30489733 is 33798403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24423364 + 6066369 = 4942^2 + 2463^2 .

It is an emirp because it is prime and its reverse (33798403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30489733 - 2¹ = 30489731 is a prime.

It is a super-2 number, since 2×30489733² = 1859247636822578, which contains 22 as substring.

Together with 30489731, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 30489692 and 30489701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30489731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15244866 + 15244867.

It is an arithmetic number, because the mean of its divisors is an integer number (15244867).

Almost surely, 2^30489733 is an apocalyptic number.

30489733 is the 2952-nd centered heptagonal number.

It is an amenable number.

30489733 is a deficient number, since it is larger than the sum of its proper divisors (1).

30489733 is an equidigital number, since it uses as much as digits as its factorization.

30489733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 30489733 is about 5521.7508998505. The cubic root of 30489733 is about 312.4049263848.

The spelling of 30489733 in words is "thirty million, four hundred eighty-nine thousand, seven hundred thirty-three".