30913385 has 8 divisors (see below), whose sum is σ = 38001096. Its totient is φ = 24127360.

The previous prime is 30913343. The next prime is 30913427. The reversal of 30913385 is 58331903.

30913385 = 3931² + 3932².

It is an interprime number because it is at equal distance from previous prime (30913343) and next prime (30913427).

It can be written as a sum of positive squares in 4 ways, for example, as 619369 + 30294016 = 787^2 + 5504^2 .

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

It is not a de Polignac number, because 30913385 - 2¹⁸ = 30651241 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75194 + ... + 75603.

It is an arithmetic number, because the mean of its divisors is an integer number (4750137).

Almost surely, 2^30913385 is an apocalyptic number.

30913385 is the 3932-nd centered square number.

It is an amenable number.

30913385 is a deficient number, since it is larger than the sum of its proper divisors (7087711).

30913385 is a wasteful number, since it uses less digits than its factorization.

30913385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150843.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 30913385 is about 5559.9806654340. The cubic root of 30913385 is about 313.8452217022.

The spelling of 30913385 in words is "thirty million, nine hundred thirteen thousand, three hundred eighty-five".