42646349 has 2 divisors, whose sum is σ = 42646350. Its totient is φ = 42646348.

The previous prime is 42646267. The next prime is 42646361. The reversal of 42646349 is 94364624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26081449 + 16564900 = 5107^2 + 4070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42646349 is a prime.

It is a super-2 number, since 2×42646349² = 3637422166059602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42646379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21323174 + 21323175.

It is an arithmetic number, because the mean of its divisors is an integer number (21323175).

Almost surely, 2^42646349 is an apocalyptic number.

It is an amenable number.

42646349 is a deficient number, since it is larger than the sum of its proper divisors (1).

42646349 is an equidigital number, since it uses as much as digits as its factorization.

42646349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 38.

The square root of 42646349 is about 6530.4172148493. The cubic root of 42646349 is about 349.3767110983.

The spelling of 42646349 in words is "forty-two million, six hundred forty-six thousand, three hundred forty-nine".