49672781 has 2 divisors, whose sum is σ = 49672782. Its totient is φ = 49672780.

The previous prime is 49672747. The next prime is 49672811. The reversal of 49672781 is 18727694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29052100 + 20620681 = 5390^2 + 4541^2 .

It is a cyclic number.

It is not a de Polignac number, because 49672781 - 2¹⁸ = 49410637 is a prime.

It is a super-2 number, since 2×49672781² = 4934770344547922, which contains 22 as substring.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49672741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24836390 + 24836391.

It is an arithmetic number, because the mean of its divisors is an integer number (24836391).

Almost surely, 2^49672781 is an apocalyptic number.

It is an amenable number.

49672781 is a deficient number, since it is larger than the sum of its proper divisors (1).

49672781 is an equidigital number, since it uses as much as digits as its factorization.

49672781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 49672781 is about 7047.8919543364. The cubic root of 49672781 is about 367.5977335817.

The spelling of 49672781 in words is "forty-nine million, six hundred seventy-two thousand, seven hundred eighty-one".