42500947397 has 4 divisors (see below), whose sum is σ = 42755444256. Its totient is φ = 42246450540.

The previous prime is 42500947387. The next prime is 42500947421. The reversal of 42500947397 is 79374900524.

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 a cyclic number.

It is not a de Polignac number, because 42500947397 - 2²⁰ = 42499898821 is a prime.

It is a super-2 number, since 2×42500947397² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42500947327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127248179 + ... + 127248512.

It is an arithmetic number, because the mean of its divisors is an integer number (10688861064).

Almost surely, 2^42500947397 is an apocalyptic number.

It is an amenable number.

42500947397 is a deficient number, since it is larger than the sum of its proper divisors (254496859).

42500947397 is a wasteful number, since it uses less digits than its factorization.

42500947397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254496858.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 42500947397 in words is "forty-two billion, five hundred million, nine hundred forty-seven thousand, three hundred ninety-seven".