1547172993 has 16 divisors (see below), whose sum is σ = 2156374656. Its totient is φ = 984867840.

The previous prime is 1547172973. The next prime is 1547173057. The reversal of 1547172993 is 3992717451.

It is not a de Polignac number, because 1547172993 - 2¹² = 1547168897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1547172973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20383 + ... + 59243.

It is an arithmetic number, because the mean of its divisors is an integer number (134773416).

Almost surely, 2^1547172993 is an apocalyptic number.

It is an amenable number.

1547172993 is a deficient number, since it is larger than the sum of its proper divisors (609201663).

1547172993 is a wasteful number, since it uses less digits than its factorization.

1547172993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39464.

The product of its digits is 476280, while the sum is 48.

The square root of 1547172993 is about 39334.1199596483. The cubic root of 1547172993 is about 1156.5905120386.

The spelling of 1547172993 in words is "one billion, five hundred forty-seven million, one hundred seventy-two thousand, nine hundred ninety-three".