1003172973 has 16 divisors (see below), whose sum is σ = 1461617472. Its totient is φ = 606960000.

The previous prime is 1003172969. The next prime is 1003172993. The reversal of 1003172973 is 3792713001.

It is a happy number.

It is not a de Polignac number, because 1003172973 - 2² = 1003172969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003172903) 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, 5458 + ... + 45123.

It is an arithmetic number, because the mean of its divisors is an integer number (91351092).

Almost surely, 2^1003172973 is an apocalyptic number.

It is an amenable number.

1003172973 is a deficient number, since it is larger than the sum of its proper divisors (458444499).

1003172973 is a wasteful number, since it uses less digits than its factorization.

1003172973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51196.

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 1003172973 is about 31672.9059765598. The cubic root of 1003172973 is about 1001.0565409947.

Adding to 1003172973 its reverse (3792713001), we get a palindrome (4795885974).

The spelling of 1003172973 in words is "one billion, three million, one hundred seventy-two thousand, nine hundred seventy-three".