1993164977 has 8 divisors (see below), whose sum is σ = 2024373600. Its totient is φ = 1961999424.

The previous prime is 1993164967. The next prime is 1993164997. The reversal of 1993164977 is 7794613991.

It is a happy number.

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 1993164977 - 2⁸ = 1993164721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1993164937) 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, 89774 + ... + 109752.

It is an arithmetic number, because the mean of its divisors is an integer number (253046700).

Almost surely, 2^1993164977 is an apocalyptic number.

It is an amenable number.

1993164977 is a deficient number, since it is larger than the sum of its proper divisors (31208623).

1993164977 is a wasteful number, since it uses less digits than its factorization.

1993164977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21535.

The product of its digits is 2571912, while the sum is 56.

The square root of 1993164977 is about 44644.8762681677. The cubic root of 1993164977 is about 1258.4841468797.

The spelling of 1993164977 in words is "one billion, nine hundred ninety-three million, one hundred sixty-four thousand, nine hundred seventy-seven".