1675631921 has 8 divisors (see below), whose sum is σ = 1712012544. Its totient is φ = 1639281760.

The previous prime is 1675631917. The next prime is 1675631927. The reversal of 1675631921 is 1291365761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1675631921 - 2² = 1675631917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1675631927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130301 + ... + 142581.

It is an arithmetic number, because the mean of its divisors is an integer number (214001568).

Almost surely, 2^1675631921 is an apocalyptic number.

It is an amenable number.

1675631921 is a deficient number, since it is larger than the sum of its proper divisors (36380623).

1675631921 is a wasteful number, since it uses less digits than its factorization.

1675631921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15231.

The product of its digits is 68040, while the sum is 41.

The square root of 1675631921 is about 40934.4832751068. The cubic root of 1675631921 is about 1187.7531978802.

The spelling of 1675631921 in words is "one billion, six hundred seventy-five million, six hundred thirty-one thousand, nine hundred twenty-one".