948138661 has 8 divisors (see below), whose sum is σ = 971420544. Its totient is φ = 924986400.

The previous prime is 948138649. The next prime is 948138701. The reversal of 948138661 is 166831849.

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 948138661 - 2⁷ = 948138533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (948138601) 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, 17515 + ... + 46936.

It is an arithmetic number, because the mean of its divisors is an integer number (121427568).

Almost surely, 2^948138661 is an apocalyptic number.

It is an amenable number.

948138661 is a deficient number, since it is larger than the sum of its proper divisors (23281883).

948138661 is a wasteful number, since it uses less digits than its factorization.

948138661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64811.

The product of its digits is 248832, while the sum is 46.

The square root of 948138661 is about 30791.8603043077. The cubic root of 948138661 is about 982.4051229747.

The spelling of 948138661 in words is "nine hundred forty-eight million, one hundred thirty-eight thousand, six hundred sixty-one".