49188309 has 8 divisors (see below), whose sum is σ = 65672352. Its totient is φ = 32748240.

The previous prime is 49188301. The next prime is 49188317. The reversal of 49188309 is 90388194.

It is an interprime number because it is at equal distance from previous prime (49188301) and next prime (49188317).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49188309 - 2³ = 49188301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49188301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8287 + ... + 12924.

It is an arithmetic number, because the mean of its divisors is an integer number (8209044).

Almost surely, 2^49188309 is an apocalyptic number.

It is an amenable number.

49188309 is a deficient number, since it is larger than the sum of its proper divisors (16484043).

49188309 is a wasteful number, since it uses less digits than its factorization.

49188309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21987.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 49188309 is about 7013.4377447868. The cubic root of 49188309 is about 366.3987338306.

The spelling of 49188309 in words is "forty-nine million, one hundred eighty-eight thousand, three hundred nine".