49739781 has 32 divisors (see below), whose sum is σ = 82188288. Its totient is φ = 26055360.

The previous prime is 49739761. The next prime is 49739801. The reversal of 49739781 is 18793794.

It is an interprime number because it is at equal distance from previous prime (49739761) and next prime (49739801).

It is not a de Polignac number, because 49739781 - 2¹⁴ = 49723397 is a prime.

It is a super-2 number, since 2×49739781² = 4948091627855922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49739781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49739761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45046 + ... + 46136.

It is an arithmetic number, because the mean of its divisors is an integer number (2568384).

Almost surely, 2^49739781 is an apocalyptic number.

It is an amenable number.

49739781 is a deficient number, since it is larger than the sum of its proper divisors (32448507).

49739781 is a wasteful number, since it uses less digits than its factorization.

49739781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281.

The product of its digits is 381024, while the sum is 48.

The square root of 49739781 is about 7052.6435469262. The cubic root of 49739781 is about 367.7629346067.

The spelling of 49739781 in words is "forty-nine million, seven hundred thirty-nine thousand, seven hundred eighty-one".