49721507 has 4 divisors (see below), whose sum is σ = 54241656. Its totient is φ = 45201360.

The previous prime is 49721491. The next prime is 49721519. The reversal of 49721507 is 70512794.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49721507 - 2⁴ = 49721491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49721587) 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, 2260058 + ... + 2260079.

It is an arithmetic number, because the mean of its divisors is an integer number (13560414).

Almost surely, 2^49721507 is an apocalyptic number.

49721507 is a deficient number, since it is larger than the sum of its proper divisors (4520149).

49721507 is a wasteful number, since it uses less digits than its factorization.

49721507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520148.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 49721507 is about 7051.3478853337. The cubic root of 49721507 is about 367.7178913642.

The spelling of 49721507 in words is "forty-nine million, seven hundred twenty-one thousand, five hundred seven".