1683521942 has 16 divisors (see below), whose sum is σ = 2659896240. Its totient is φ = 796946688.

The previous prime is 1683521927. The next prime is 1683521971. The reversal of 1683521942 is 2491253861.

It is a super-2 number, since 2×1683521942² = 5668492258390902728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1683521942.

It is a congruent number.

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, 49598 + ... + 76334.

It is an arithmetic number, because the mean of its divisors is an integer number (166243515).

Almost surely, 2^1683521942 is an apocalyptic number.

1683521942 is a deficient number, since it is larger than the sum of its proper divisors (976374298).

1683521942 is a wasteful number, since it uses less digits than its factorization.

1683521942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28415.

The product of its digits is 103680, while the sum is 41.

The square root of 1683521942 is about 41030.7438635957. The cubic root of 1683521942 is about 1189.6145308956.

The spelling of 1683521942 in words is "one billion, six hundred eighty-three million, five hundred twenty-one thousand, nine hundred forty-two".