49781919 has 16 divisors (see below), whose sum is σ = 76222080. Its totient is φ = 28582560.

The previous prime is 49781911. The next prime is 49781969. The reversal of 49781919 is 91918794.

It is not a de Polignac number, because 49781919 - 2³ = 49781911 is a prime.

It is a super-2 number, since 2×49781919² = 4956478918645122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49781911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39072 + ... + 40325.

It is an arithmetic number, because the mean of its divisors is an integer number (4763880).

Almost surely, 2^49781919 is an apocalyptic number.

49781919 is a deficient number, since it is larger than the sum of its proper divisors (26440161).

49781919 is a wasteful number, since it uses less digits than its factorization.

49781919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79430.

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

The square root of 49781919 is about 7055.6303049409. The cubic root of 49781919 is about 367.8667577448.

The spelling of 49781919 in words is "forty-nine million, seven hundred eighty-one thousand, nine hundred nineteen".