49121917 has 8 divisors (see below), whose sum is σ = 52972920. Its totient is φ = 45281280.

The previous prime is 49121899. The next prime is 49121923. The reversal of 49121917 is 71912194.

It can be written as a sum of positive squares in 4 ways, for example, as 4044121 + 45077796 = 2011^2 + 6714^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49121917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49121927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9309 + ... + 13597.

It is an arithmetic number, because the mean of its divisors is an integer number (6621615).

Almost surely, 2^49121917 is an apocalyptic number.

It is an amenable number.

49121917 is a deficient number, since it is larger than the sum of its proper divisors (3851003).

49121917 is a wasteful number, since it uses less digits than its factorization.

49121917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5183.

The product of its digits is 4536, while the sum is 34.

The square root of 49121917 is about 7008.7029470509. The cubic root of 49121917 is about 366.2338105111.

The spelling of 49121917 in words is "forty-nine million, one hundred twenty-one thousand, nine hundred seventeen".