46487981 has 2 divisors, whose sum is σ = 46487982. Its totient is φ = 46487980.

The previous prime is 46487971. The next prime is 46487989. The reversal of 46487981 is 18978464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42367081 + 4120900 = 6509^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 46487981 - 2¹⁴ = 46471597 is a prime.

It is a super-2 number, since 2×46487981² = 4322264754912722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46487989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23243990 + 23243991.

It is an arithmetic number, because the mean of its divisors is an integer number (23243991).

Almost surely, 2^46487981 is an apocalyptic number.

It is an amenable number.

46487981 is a deficient number, since it is larger than the sum of its proper divisors (1).

46487981 is an equidigital number, since it uses as much as digits as its factorization.

46487981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 46487981 is about 6818.2095157013. The cubic root of 46487981 is about 359.5673325715.

The spelling of 46487981 in words is "forty-six million, four hundred eighty-seven thousand, nine hundred eighty-one".