49971819 has 4 divisors (see below), whose sum is σ = 66629096. Its totient is φ = 33314544.

The previous prime is 49971811. The next prime is 49971827. The reversal of 49971819 is 91817994.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (49971811) and next prime (49971827).

It is not a de Polignac number, because 49971819 - 2³ = 49971811 is a prime.

It is a super-2 number, since 2×49971819² = 4994365388337522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49971811) 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, 8328634 + ... + 8328639.

It is an arithmetic number, because the mean of its divisors is an integer number (16657274).

Almost surely, 2^49971819 is an apocalyptic number.

49971819 is a deficient number, since it is larger than the sum of its proper divisors (16657277).

49971819 is a wasteful number, since it uses less digits than its factorization.

49971819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16657276.

The product of its digits is 163296, while the sum is 48.

The square root of 49971819 is about 7069.0748333852. The cubic root of 49971819 is about 368.3339237289. Note that the first 3 decimals are identical.

The spelling of 49971819 in words is "forty-nine million, nine hundred seventy-one thousand, eight hundred nineteen".