30929143 has 12 divisors (see below), whose sum is σ = 36519672. Its totient is φ = 26112240.

The previous prime is 30929141. The next prime is 30929147. The reversal of 30929143 is 34192903.

It is not a de Polignac number, because 30929143 - 2¹ = 30929141 is a prime.

It is a super-2 number, since 2×30929143² = 1913223773428898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30929141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1428 + ... + 7993.

It is an arithmetic number, because the mean of its divisors is an integer number (3043306).

Almost surely, 2^30929143 is an apocalyptic number.

30929143 is a deficient number, since it is larger than the sum of its proper divisors (5590529).

30929143 is an equidigital number, since it uses as much as digits as its factorization.

30929143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9502 (or 9495 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 30929143 is about 5561.3975761494. The cubic root of 30929143 is about 313.8985398459.

The spelling of 30929143 in words is "thirty million, nine hundred twenty-nine thousand, one hundred forty-three".