49397769 has 18 divisors (see below), whose sum is σ = 74102730. Its totient is φ = 32927472.

The previous prime is 49397741. The next prime is 49397779. The reversal of 49397769 is 96779394.

49397769 is a `hidden beast` number, since 493 + 97 + 7 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38900169 + 10497600 = 6237^2 + 3240^2 .

It is not a de Polignac number, because 49397769 - 2⁵ = 49397737 is a prime.

It is a super-2 number, since 2×49397769² = 4880279164354722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49397779) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2797 + ... + 10325.

Almost surely, 2^49397769 is an apocalyptic number.

It is an amenable number.

49397769 is a deficient number, since it is larger than the sum of its proper divisors (24704961).

49397769 is an frugal number, since it uses more digits than its factorization.

49397769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7553 (or 7532 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 49397769 is about 7028.3546438694. The cubic root of 49397769 is about 366.9180794565.

Adding to 49397769 its product of digits (2571912), we get a square (51969681 = 7209²).

The spelling of 49397769 in words is "forty-nine million, three hundred ninety-seven thousand, seven hundred sixty-nine".