30387396989 has 8 divisors (see below), whose sum is σ = 31468300632. Its totient is φ = 29325291840.

The previous prime is 30387396983. The next prime is 30387397069. The reversal of 30387396989 is 98969378303.

It can be written as a sum of positive squares in 4 ways, for example, as 24334489 + 30363062500 = 4933^2 + 174250^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30387396989 - 2²⁰ = 30386348413 is a prime.

It is a super-2 number, since 2×30387396989² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30387396983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4696334 + ... + 4702799.

It is an arithmetic number, because the mean of its divisors is an integer number (3933537579).

Almost surely, 2^30387396989 is an apocalyptic number.

It is an amenable number.

30387396989 is a deficient number, since it is larger than the sum of its proper divisors (1080903643).

30387396989 is an equidigital number, since it uses as much as digits as its factorization.

30387396989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9399247.

The product of its (nonzero) digits is 52907904, while the sum is 65.

The spelling of 30387396989 in words is "thirty billion, three hundred eighty-seven million, three hundred ninety-six thousand, nine hundred eighty-nine".