3894624749 has 2 divisors, whose sum is σ = 3894624750. Its totient is φ = 3894624748.

The previous prime is 3894624743. The next prime is 3894624859. The reversal of 3894624749 is 9474264983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2547220900 + 1347403849 = 50470^2 + 36707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3894624749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3894624694 and 3894624703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3894624743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1947312374 + 1947312375.

It is an arithmetic number, because the mean of its divisors is an integer number (1947312375).

Almost surely, 2^3894624749 is an apocalyptic number.

It is an amenable number.

3894624749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3894624749 is an equidigital number, since it uses as much as digits as its factorization.

3894624749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 56.

The square root of 3894624749 is about 62406.9286938558. The cubic root of 3894624749 is about 1573.3374240962.

The spelling of 3894624749 in words is "three billion, eight hundred ninety-four million, six hundred twenty-four thousand, seven hundred forty-nine".