1631997234 has 72 divisors (see below), whose sum is σ = 4265705808. Its totient is φ = 466278120.

The previous prime is 1631997203. The next prime is 1631997287. The reversal of 1631997234 is 4327991361.

1631997234 is a `hidden beast` number, since 1 + 631 + 9 + 9 + 7 + 2 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1631997234.

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 35 ways as a sum of consecutive naturals, for example, 10452 + ... + 58079.

It is an arithmetic number, because the mean of its divisors is an integer number (59245914).

Almost surely, 2^1631997234 is an apocalyptic number.

1631997234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1631997234 is an abundant number, since it is smaller than the sum of its proper divisors (2633708574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1631997234 is an equidigital number, since it uses as much as digits as its factorization.

1631997234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68562 (or 68543 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 1631997234 is about 40397.9855190825. The cubic root of 1631997234 is about 1177.3523982295.

The spelling of 1631997234 in words is "one billion, six hundred thirty-one million, nine hundred ninety-seven thousand, two hundred thirty-four".