9149101921 has 4 divisors (see below), whose sum is σ = 9343763712. Its totient is φ = 8954440132.

The previous prime is 9149101877. The next prime is 9149101937. The reversal of 9149101921 is 1291019419.

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: 1291019419 = 29 ⋅44517911.

It is a cyclic number.

It is not a de Polignac number, because 9149101921 - 2¹³ = 9149093729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9149111921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97330825 + ... + 97330918.

It is an arithmetic number, because the mean of its divisors is an integer number (2335940928).

Almost surely, 2^9149101921 is an apocalyptic number.

It is an amenable number.

9149101921 is a deficient number, since it is larger than the sum of its proper divisors (194661791).

9149101921 is a wasteful number, since it uses less digits than its factorization.

9149101921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194661790.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 9149101921 is about 95650.9378992177. The cubic root of 9149101921 is about 2091.5077999568.

The spelling of 9149101921 in words is "nine billion, one hundred forty-nine million, one hundred one thousand, nine hundred twenty-one".