1978953 has 8 divisors (see below), whose sum is σ = 2793888. Its totient is φ = 1241664.

The previous prime is 1978927. The next prime is 1978981. The reversal of 1978953 is 3598791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1978953 - 2⁹ = 1978441 is a prime.

It is a Curzon number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (1978913) 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, 19351 + ... + 19452.

It is an arithmetic number, because the mean of its divisors is an integer number (349236).

2^1978953 is an apocalyptic number.

It is an amenable number.

1978953 is a deficient number, since it is larger than the sum of its proper divisors (814935).

1978953 is a wasteful number, since it uses less digits than its factorization.

1978953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38823.

The product of its digits is 68040, while the sum is 42.

The square root of 1978953 is about 1406.7526435020. The cubic root of 1978953 is about 125.5485862364.

The spelling of 1978953 in words is "one million, nine hundred seventy-eight thousand, nine hundred fifty-three".