47021749 has 2 divisors, whose sum is σ = 47021750. Its totient is φ = 47021748.

The previous prime is 47021719. The next prime is 47021753. The reversal of 47021749 is 94712074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32695524 + 14326225 = 5718^2 + 3785^2 .

It is a cyclic number.

It is not a de Polignac number, because 47021749 - 2⁷ = 47021621 is a prime.

It is a super-2 number, since 2×47021749² = 4422089758038002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47021719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23510874 + 23510875.

It is an arithmetic number, because the mean of its divisors is an integer number (23510875).

Almost surely, 2^47021749 is an apocalyptic number.

It is an amenable number.

47021749 is a deficient number, since it is larger than the sum of its proper divisors (1).

47021749 is an equidigital number, since it uses as much as digits as its factorization.

47021749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 47021749 is about 6857.2406257911. The cubic root of 47021749 is about 360.9382649322.

The spelling of 47021749 in words is "forty-seven million, twenty-one thousand, seven hundred forty-nine".