49142989 has 4 divisors (see below), whose sum is σ = 56163424. Its totient is φ = 42122556.

The previous prime is 49142981. The next prime is 49143037. The reversal of 49142989 is 98924194.

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: 98924194 = 2 ⋅49462097.

It is not a de Polignac number, because 49142989 - 2³ = 49142981 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 (49142981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3510207 + ... + 3510220.

It is an arithmetic number, because the mean of its divisors is an integer number (14040856).

Almost surely, 2^49142989 is an apocalyptic number.

It is an amenable number.

49142989 is a deficient number, since it is larger than the sum of its proper divisors (7020435).

49142989 is an equidigital number, since it uses as much as digits as its factorization.

49142989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020434.

The product of its digits is 186624, while the sum is 46.

The square root of 49142989 is about 7010.2060597389. The cubic root of 49142989 is about 366.2861712229.

The spelling of 49142989 in words is "forty-nine million, one hundred forty-two thousand, nine hundred eighty-nine".