1147985149 has 16 divisors (see below), whose sum is σ = 1249600000. Its totient is φ = 1050615360.

The previous prime is 1147985143. The next prime is 1147985159. The reversal of 1147985149 is 9415897411.

It is a cyclic number.

It is not a de Polignac number, because 1147985149 - 2¹⁹ = 1147460861 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 (1147985143) 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, 416227 + ... + 418975.

It is an arithmetic number, because the mean of its divisors is an integer number (78100000).

Almost surely, 2^1147985149 is an apocalyptic number.

1147985149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1147985149 is a deficient number, since it is larger than the sum of its proper divisors (101614851).

1147985149 is a wasteful number, since it uses less digits than its factorization.

1147985149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508.

The product of its digits is 362880, while the sum is 49.

The square root of 1147985149 is about 33881.9295347830. The cubic root of 1147985149 is about 1047.0773292979.

The spelling of 1147985149 in words is "one billion, one hundred forty-seven million, nine hundred eighty-five thousand, one hundred forty-nine".