42952813 has 2 divisors, whose sum is σ = 42952814. Its totient is φ = 42952812.

The previous prime is 42952781. The next prime is 42952823. The reversal of 42952813 is 31825924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40998409 + 1954404 = 6403^2 + 1398^2 .

It is a cyclic number.

It is not a de Polignac number, because 42952813 - 2⁵ = 42952781 is a prime.

It is a super-2 number, since 2×42952813² = 3689888289225938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42952823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21476406 + 21476407.

It is an arithmetic number, because the mean of its divisors is an integer number (21476407).

Almost surely, 2^42952813 is an apocalyptic number.

It is an amenable number.

42952813 is a deficient number, since it is larger than the sum of its proper divisors (1).

42952813 is an equidigital number, since it uses as much as digits as its factorization.

42952813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 42952813 is about 6553.8395616615. The cubic root of 42952813 is about 350.2116080915.

The spelling of 42952813 in words is "forty-two million, nine hundred fifty-two thousand, eight hundred thirteen".