42291687953 has 2 divisors, whose sum is σ = 42291687954. Its totient is φ = 42291687952.

The previous prime is 42291687901. The next prime is 42291687973. The reversal of 42291687953 is 35978619224.

42291687953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39667892224 + 2623795729 = 199168^2 + 51223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42291687953 is a prime.

It is a super-3 number, since 3×42291687953³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42291687973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21145843976 + 21145843977.

It is an arithmetic number, because the mean of its divisors is an integer number (21145843977).

Almost surely, 2^42291687953 is an apocalyptic number.

It is an amenable number.

42291687953 is a deficient number, since it is larger than the sum of its proper divisors (1).

42291687953 is an equidigital number, since it uses as much as digits as its factorization.

42291687953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The spelling of 42291687953 in words is "forty-two billion, two hundred ninety-one million, six hundred eighty-seven thousand, nine hundred fifty-three".