1954160639 has 4 divisors (see below), whose sum is σ = 1954628040. Its totient is φ = 1953693240.

The previous prime is 1954160623. The next prime is 1954160651. The reversal of 1954160639 is 9360614591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1954160639 - 2⁴ = 1954160623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1954160639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954160539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227372 + ... + 235809.

It is an arithmetic number, because the mean of its divisors is an integer number (488657010).

Almost surely, 2^1954160639 is an apocalyptic number.

1954160639 is a deficient number, since it is larger than the sum of its proper divisors (467401).

1954160639 is an equidigital number, since it uses as much as digits as its factorization.

1954160639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467400.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 1954160639 is about 44205.8891891114. The cubic root of 1954160639 is about 1250.2208972812.

The spelling of 1954160639 in words is "one billion, nine hundred fifty-four million, one hundred sixty thousand, six hundred thirty-nine".