49151789 has 4 divisors (see below), whose sum is σ = 49426560. Its totient is φ = 48877020.

The previous prime is 49151783. The next prime is 49151797. The reversal of 49151789 is 98715194.

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.

It is a cyclic number.

It is not a de Polignac number, because 49151789 - 2⁸ = 49151533 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 (49151783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137117 + ... + 137474.

It is an arithmetic number, because the mean of its divisors is an integer number (12356640).

Almost surely, 2^49151789 is an apocalyptic number.

It is an amenable number.

49151789 is a deficient number, since it is larger than the sum of its proper divisors (274771).

49151789 is a wasteful number, since it uses less digits than its factorization.

49151789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274770.

The product of its digits is 90720, while the sum is 44.

The square root of 49151789 is about 7010.8336879433. The cubic root of 49151789 is about 366.3080334525.

The spelling of 49151789 in words is "forty-nine million, one hundred fifty-one thousand, seven hundred eighty-nine".