2053978 has 4 divisors (see below), whose sum is σ = 3080970. Its totient is φ = 1026988.

The previous prime is 2053951. The next prime is 2053979. The reversal of 2053978 is 8793502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8793502 = 2 ⋅4396751.

It can be written as a sum of positive squares in only one way, i.e., 1194649 + 859329 = 1093^2 + 927^2 .

It is not an unprimeable number, because it can be changed into a prime (2053979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513493 + ... + 513496.

2^2053978 is an apocalyptic number.

2053978 is a deficient number, since it is larger than the sum of its proper divisors (1026992).

2053978 is a wasteful number, since it uses less digits than its factorization.

2053978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026991.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 2053978 is about 1433.1706109183. The cubic root of 2053978 is about 127.1155251124.

The spelling of 2053978 in words is "two million, fifty-three thousand, nine hundred seventy-eight".