49191869 has 4 divisors (see below), whose sum is σ = 49926144. Its totient is φ = 48457596.

The previous prime is 49191851. The next prime is 49191881. The reversal of 49191869 is 96819194.

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 49191869 - 2¹² = 49187773 is a prime.

It is a super-2 number, since 2×49191869² = 4839679951426322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49191839) 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, 367037 + ... + 367170.

It is an arithmetic number, because the mean of its divisors is an integer number (12481536).

Almost surely, 2^49191869 is an apocalyptic number.

It is an amenable number.

49191869 is a deficient number, since it is larger than the sum of its proper divisors (734275).

49191869 is an equidigital number, since it uses as much as digits as its factorization.

49191869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734274.

The product of its digits is 139968, while the sum is 47.

The square root of 49191869 is about 7013.6915386977. The cubic root of 49191869 is about 366.4075729773.

The spelling of 49191869 in words is "forty-nine million, one hundred ninety-one thousand, eight hundred sixty-nine".