49297921 has 4 divisors (see below), whose sum is σ = 49403952. Its totient is φ = 49191892.

The previous prime is 49297903. The next prime is 49297931. The reversal of 49297921 is 12979294.

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: 12979294 = 2 ⋅6489647.

It is a cyclic number.

It is not a de Polignac number, because 49297921 - 2⁵ = 49297889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49297931) 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, 52315 + ... + 53248.

It is an arithmetic number, because the mean of its divisors is an integer number (12350988).

Almost surely, 2^49297921 is an apocalyptic number.

It is an amenable number.

49297921 is a deficient number, since it is larger than the sum of its proper divisors (106031).

49297921 is a wasteful number, since it uses less digits than its factorization.

49297921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106030.

The product of its digits is 81648, while the sum is 43.

The square root of 49297921 is about 7021.2478235710. The cubic root of 49297921 is about 366.6706948134.

The spelling of 49297921 in words is "forty-nine million, two hundred ninety-seven thousand, nine hundred twenty-one".