43986672949 has 2 divisors, whose sum is σ = 43986672950. Its totient is φ = 43986672948.

The previous prime is 43986672869. The next prime is 43986672979. The reversal of 43986672949 is 94927668934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43986672900 + 49 = 209730^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 43986672949 - 2¹¹ = 43986670901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43986672979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21993336474 + 21993336475.

It is an arithmetic number, because the mean of its divisors is an integer number (21993336475).

Almost surely, 2^43986672949 is an apocalyptic number.

It is an amenable number.

43986672949 is a deficient number, since it is larger than the sum of its proper divisors (1).

43986672949 is an equidigital number, since it uses as much as digits as its factorization.

43986672949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141087744, while the sum is 67.

It can be divided in two parts, 439866729 and 49, that multiplied together give a square (21553469721 = 146811²).

The spelling of 43986672949 in words is "forty-three billion, nine hundred eighty-six million, six hundred seventy-two thousand, nine hundred forty-nine".