1978803 has 16 divisors (see below), whose sum is σ = 2970240. Its totient is φ = 1301832.

The previous prime is 1978799. The next prime is 1978807. The reversal of 1978803 is 3088791.

It is an interprime number because it is at equal distance from previous prime (1978799) and next prime (1978807).

It is not a de Polignac number, because 1978803 - 2² = 1978799 is a prime.

It is a super-2 number, since 2×1978803² = 7831322625618, which contains 22 as substring.

1978803 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1978807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1800 + ... + 2682.

It is an arithmetic number, because the mean of its divisors is an integer number (185640).

2^1978803 is an apocalyptic number.

1978803 is a deficient number, since it is larger than the sum of its proper divisors (991437).

1978803 is an equidigital number, since it uses as much as digits as its factorization.

1978803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1978803 is about 1406.6993282148. The cubic root of 1978803 is about 125.5454140601.

The spelling of 1978803 in words is "one million, nine hundred seventy-eight thousand, eight hundred three".