1670720943 has 32 divisors (see below), whose sum is σ = 2410560000. Its totient is φ = 1026118016.

The previous prime is 1670720899. The next prime is 1670720959. The reversal of 1670720943 is 3490270761.

It is a cyclic number.

It is not a de Polignac number, because 1670720943 - 2¹² = 1670716847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670720963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1113808 + ... + 1115306.

It is an arithmetic number, because the mean of its divisors is an integer number (75330000).

Almost surely, 2^1670720943 is an apocalyptic number.

1670720943 is a deficient number, since it is larger than the sum of its proper divisors (739839057).

1670720943 is a wasteful number, since it uses less digits than its factorization.

1670720943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 1670720943 is about 40874.4534275383. The cubic root of 1670720943 is about 1186.5916982353.

The spelling of 1670720943 in words is "one billion, six hundred seventy million, seven hundred twenty thousand, nine hundred forty-three".