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BaseRepresentation
bin111010101000…
…1000100110101
32010211210102202
41311101010311
530332201124
63014514245
7522202202
oct165210465
963753382
1030740789
1116397012
12a365985
1364a4221
144122ca9
152a735ae
hex1d51135

30740789 has 2 divisors, whose sum is σ = 30740790. Its totient is φ = 30740788.

The previous prime is 30740771. The next prime is 30740797. The reversal of 30740789 is 98704703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30360100 + 380689 = 5510^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 30740789 - 28 = 30740533 is a prime.

It is a super-3 number, since 3×307407893 (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30740989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15370394 + 15370395.

It is an arithmetic number, because the mean of its divisors is an integer number (15370395).

Almost surely, 230740789 is an apocalyptic number.

It is an amenable number.

30740789 is a deficient number, since it is larger than the sum of its proper divisors (1).

30740789 is an equidigital number, since it uses as much as digits as its factorization.

30740789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 30740789 is about 5544.4376630998. The cubic root of 30740789 is about 313.2600430918.

The spelling of 30740789 in words is "thirty million, seven hundred forty thousand, seven hundred eighty-nine".