1146551997 has 4 divisors (see below), whose sum is σ = 1528736000. Its totient is φ = 764367996.

The previous prime is 1146551983. The next prime is 1146552007. The reversal of 1146551997 is 7991556411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7991556411 = 3 ⋅2663852137.

It is not a de Polignac number, because 1146551997 - 2⁸ = 1146551741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1146552997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191091997 + ... + 191092002.

It is an arithmetic number, because the mean of its divisors is an integer number (382184000).

Almost surely, 2^1146551997 is an apocalyptic number.

It is an amenable number.

1146551997 is a deficient number, since it is larger than the sum of its proper divisors (382184003).

1146551997 is an equidigital number, since it uses as much as digits as its factorization.

1146551997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382184002.

The product of its digits is 340200, while the sum is 48.

The square root of 1146551997 is about 33860.7737212250. The cubic root of 1146551997 is about 1046.6414218401.

The spelling of 1146551997 in words is "one billion, one hundred forty-six million, five hundred fifty-one thousand, nine hundred ninety-seven".