1973403 has 14 divisors (see below), whose sum is σ = 2959844. Its totient is φ = 1315116.

The previous prime is 1973381. The next prime is 1973407. The reversal of 1973403 is 3043791.

It is not a de Polignac number, because 1973403 - 2⁶ = 1973339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

1973403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1973407) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 625 + ... + 2082.

2^1973403 is an apocalyptic number.

1973403 is a deficient number, since it is larger than the sum of its proper divisors (986441).

1973403 is an frugal number, since it uses more digits than its factorization.

1973403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 1973403 is about 1404.7786302475. The cubic root of 1973403 is about 125.4311087857.

It can be divided in two parts, 197 and 3403, that added together give a square (3600 = 60²).

The spelling of 1973403 in words is "one million, nine hundred seventy-three thousand, four hundred three".