1631739434 has 16 divisors (see below), whose sum is σ = 2656647168. Its totient is φ = 747178992.

The previous prime is 1631739427. The next prime is 1631739449. The reversal of 1631739434 is 4349371361.

It is a junction number, because it is equal to n+sod(n) for n = 1631739391 and 1631739400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243782 + ... + 250385.

It is an arithmetic number, because the mean of its divisors is an integer number (166040448).

Almost surely, 2^1631739434 is an apocalyptic number.

1631739434 is a deficient number, since it is larger than the sum of its proper divisors (1024907734).

1631739434 is a wasteful number, since it uses less digits than its factorization.

1631739434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494309.

The product of its digits is 163296, while the sum is 41.

The square root of 1631739434 is about 40394.7946399038. The cubic root of 1631739434 is about 1177.2904011000.

The spelling of 1631739434 in words is "one billion, six hundred thirty-one million, seven hundred thirty-nine thousand, four hundred thirty-four".