47051989 has 2 divisors, whose sum is σ = 47051990. Its totient is φ = 47051988.

The previous prime is 47051947. The next prime is 47052011. The reversal of 47051989 is 98915074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43692100 + 3359889 = 6610^2 + 1833^2 .

It is a cyclic number.

It is not a de Polignac number, because 47051989 - 2⁷ = 47051861 is a prime.

It is a super-2 number, since 2×47051989² = 4427779337712242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47051909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23525994 + 23525995.

It is an arithmetic number, because the mean of its divisors is an integer number (23525995).

Almost surely, 2^47051989 is an apocalyptic number.

It is an amenable number.

47051989 is a deficient number, since it is larger than the sum of its proper divisors (1).

47051989 is an equidigital number, since it uses as much as digits as its factorization.

47051989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 47051989 is about 6859.4452399593. The cubic root of 47051989 is about 361.0156222857.

The spelling of 47051989 in words is "forty-seven million, fifty-one thousand, nine hundred eighty-nine".