49398989 has 4 divisors (see below), whose sum is σ = 50236320. Its totient is φ = 48561660.

The previous prime is 49398971. The next prime is 49398997. The reversal of 49398989 is 98989394.

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 49398989 - 2²⁰ = 48350413 is a prime.

It is a super-2 number, since 2×49398989² = 4880520228444242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 837271 = 49398989 / (4 + 9 + 3 + 9 + 8 + 9 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49398389) 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, 418577 + ... + 418694.

It is an arithmetic number, because the mean of its divisors is an integer number (12559080).

Almost surely, 2^49398989 is an apocalyptic number.

It is an amenable number.

49398989 is a deficient number, since it is larger than the sum of its proper divisors (837331).

49398989 is an equidigital number, since it uses as much as digits as its factorization.

49398989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837330.

The product of its digits is 5038848, while the sum is 59.

The square root of 49398989 is about 7028.4414346283. The cubic root of 49398989 is about 366.9211000813.

The spelling of 49398989 in words is "forty-nine million, three hundred ninety-eight thousand, nine hundred eighty-nine".