46871989 has 2 divisors, whose sum is σ = 46871990. Its totient is φ = 46871988.

The previous prime is 46871987. The next prime is 46872011. The reversal of 46871989 is 98917864.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38068900 + 8803089 = 6170^2 + 2967^2 .

It is a cyclic number.

It is not a de Polignac number, because 46871989 - 2¹ = 46871987 is a prime.

It is a super-2 number, since 2×46871989² = 4393966705632242, which contains 22 as substring.

Together with 46871987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46871983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23435994 + 23435995.

It is an arithmetic number, because the mean of its divisors is an integer number (23435995).

Almost surely, 2^46871989 is an apocalyptic number.

It is an amenable number.

46871989 is a deficient number, since it is larger than the sum of its proper divisors (1).

46871989 is an equidigital number, since it uses as much as digits as its factorization.

46871989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 46871989 is about 6846.3120729339. The cubic root of 46871989 is about 360.5546722098.

The spelling of 46871989 in words is "forty-six million, eight hundred seventy-one thousand, nine hundred eighty-nine".