42859437693997 has 2 divisors, whose sum is σ = 42859437693998. Its totient is φ = 42859437693996.

The previous prime is 42859437693991. The next prime is 42859437694013. The reversal of 42859437693997 is 79939673495824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42782143129636 + 77294564361 = 6540806^2 + 278019^2 .

It is a cyclic number.

It is not a de Polignac number, because 42859437693997 - 2¹¹ = 42859437691949 is a prime.

It is a super-2 number, since 2×42859437693997² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42859437693991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21429718846998 + 21429718846999.

It is an arithmetic number, because the mean of its divisors is an integer number (21429718846999).

Almost surely, 2^{42859437693997} is an apocalyptic number.

It is an amenable number.

42859437693997 is a deficient number, since it is larger than the sum of its proper divisors (1).

42859437693997 is an equidigital number, since it uses as much as digits as its factorization.

42859437693997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22221319680, while the sum is 85.

The spelling of 42859437693997 in words is "forty-two trillion, eight hundred fifty-nine billion, four hundred thirty-seven million, six hundred ninety-three thousand, nine hundred ninety-seven".