42691693 has 4 divisors (see below), whose sum is σ = 46572768. Its totient is φ = 38810620.

The previous prime is 42691687. The next prime is 42691699. The reversal of 42691693 is 39619624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (42691687) and next prime (42691699).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42691693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42691699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1940521 + ... + 1940542.

It is an arithmetic number, because the mean of its divisors is an integer number (11643192).

Almost surely, 2^42691693 is an apocalyptic number.

It is an amenable number.

42691693 is a deficient number, since it is larger than the sum of its proper divisors (3881075).

42691693 is a wasteful number, since it uses less digits than its factorization.

42691693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881074.

The product of its digits is 69984, while the sum is 40.

The square root of 42691693 is about 6533.8880461789. Note that the first 3 decimals coincide. The cubic root of 42691693 is about 349.5004929032.

The spelling of 42691693 in words is "forty-two million, six hundred ninety-one thousand, six hundred ninety-three".