1670837421 has 16 divisors (see below), whose sum is σ = 2453027328. Its totient is φ = 1003162800.

The previous prime is 1670837417. The next prime is 1670837459. The reversal of 1670837421 is 1247380761.

It is not a de Polignac number, because 1670837421 - 2² = 1670837417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1670837421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670837621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233065 + ... + 240126.

It is an arithmetic number, because the mean of its divisors is an integer number (153314208).

Almost surely, 2^1670837421 is an apocalyptic number.

1670837421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1670837421 is a deficient number, since it is larger than the sum of its proper divisors (782189907).

1670837421 is a wasteful number, since it uses less digits than its factorization.

1670837421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473312.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 1670837421 is about 40875.8782290974. The cubic root of 1670837421 is about 1186.6192728813.

The spelling of 1670837421 in words is "one billion, six hundred seventy million, eight hundred thirty-seven thousand, four hundred twenty-one".