30909393869 has 2 divisors, whose sum is σ = 30909393870. Its totient is φ = 30909393868.

The previous prime is 30909393833. The next prime is 30909393961. The reversal of 30909393869 is 96839390903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18222300100 + 12687093769 = 134990^2 + 112637^2 .

It is a cyclic number.

It is not a de Polignac number, because 30909393869 - 2¹² = 30909389773 is a prime.

It is a super-2 number, since 2×30909393869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30909393269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15454696934 + 15454696935.

It is an arithmetic number, because the mean of its divisors is an integer number (15454696935).

Almost surely, 2^30909393869 is an apocalyptic number.

It is an amenable number.

30909393869 is a deficient number, since it is larger than the sum of its proper divisors (1).

30909393869 is an equidigital number, since it uses as much as digits as its factorization.

30909393869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8503056, while the sum is 59.

The spelling of 30909393869 in words is "thirty billion, nine hundred nine million, three hundred ninety-three thousand, eight hundred sixty-nine".