1820984929 has 9 divisors (see below), whose sum is σ = 1840173777. Its totient is φ = 1801995444.

The previous prime is 1820984923. The next prime is 1820984939. The reversal of 1820984929 is 9294890281.

The square root of 1820984929 is 42673.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1820984929 - 2²⁹ = 1284114017 is a prime.

It is a super-2 number, since 2×1820984929² = 6631972223290270082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1820984923) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5931394 + ... + 5931700.

It is an arithmetic number, because the mean of its divisors is an integer number (204463753).

Almost surely, 2^1820984929 is an apocalyptic number.

1820984929 is the 42673-rd square number.

1820984929 is the 21337-th centered octagonal number.

It is an amenable number.

1820984929 is a deficient number, since it is larger than the sum of its proper divisors (19188848).

1820984929 is an frugal number, since it uses more digits than its factorization.

1820984929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The cubic root of 1820984929 is about 1221.1493533489.

The spelling of 1820984929 in words is "one billion, eight hundred twenty million, nine hundred eighty-four thousand, nine hundred twenty-nine".