1671398907 has 16 divisors (see below), whose sum is σ = 2308551840. Its totient is φ = 1074867200.

The previous prime is 1671398893. The next prime is 1671398923. The reversal of 1671398907 is 7098931761.

It is a cyclic number.

It is not a de Polignac number, because 1671398907 - 2¹² = 1671394811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1671398907.

It is not an unprimeable number, because it can be changed into a prime (1671398947) 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, 65394 + ... + 87287.

It is an arithmetic number, because the mean of its divisors is an integer number (144284490).

Almost surely, 2^1671398907 is an apocalyptic number.

1671398907 is a deficient number, since it is larger than the sum of its proper divisors (637152933).

1671398907 is a wasteful number, since it uses less digits than its factorization.

1671398907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152814.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 1671398907 is about 40882.7458348874. The cubic root of 1671398907 is about 1186.7521793870.

The spelling of 1671398907 in words is "one billion, six hundred seventy-one million, three hundred ninety-eight thousand, nine hundred seven".