49623781 has 2 divisors, whose sum is σ = 49623782. Its totient is φ = 49623780.

The previous prime is 49623773. The next prime is 49623793. The reversal of 49623781 is 18732694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33350625 + 16273156 = 5775^2 + 4034^2 .

It is a cyclic number.

It is not a de Polignac number, because 49623781 - 2³ = 49623773 is a prime.

It is a super-2 number, since 2×49623781² = 4925039281471922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49623701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24811890 + 24811891.

It is an arithmetic number, because the mean of its divisors is an integer number (24811891).

Almost surely, 2^49623781 is an apocalyptic number.

It is an amenable number.

49623781 is a deficient number, since it is larger than the sum of its proper divisors (1).

49623781 is an equidigital number, since it uses as much as digits as its factorization.

49623781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 49623781 is about 7044.4148798889. The cubic root of 49623781 is about 367.4768208498.

The spelling of 49623781 in words is "forty-nine million, six hundred twenty-three thousand, seven hundred eighty-one".