42699997 has 2 divisors, whose sum is σ = 42699998. Its totient is φ = 42699996.

The previous prime is 42699967. The next prime is 42700037. The reversal of 42699997 is 79999624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38675961 + 4024036 = 6219^2 + 2006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42699997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42699967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21349998 + 21349999.

It is an arithmetic number, because the mean of its divisors is an integer number (21349999).

Almost surely, 2^42699997 is an apocalyptic number.

It is an amenable number.

42699997 is a deficient number, since it is larger than the sum of its proper divisors (1).

42699997 is an equidigital number, since it uses as much as digits as its factorization.

42699997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 55.

The square root of 42699997 is about 6534.5234715318. The cubic root of 42699997 is about 349.5231519869.

The spelling of 42699997 in words is "forty-two million, six hundred ninety-nine thousand, nine hundred ninety-seven".