97434056521 has 4 divisors (see below), whose sum is σ = 101670319872. Its totient is φ = 93197793172.

The previous prime is 97434056509. The next prime is 97434056557. The reversal of 97434056521 is 12565043479.

It is a happy number.

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 not a de Polignac number, because 97434056521 - 2²¹ = 97431959369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97434056561) 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, 2118131641 + ... + 2118131686.

It is an arithmetic number, because the mean of its divisors is an integer number (25417579968).

Almost surely, 2^97434056521 is an apocalyptic number.

It is an amenable number.

97434056521 is a deficient number, since it is larger than the sum of its proper divisors (4236263351).

97434056521 is a wasteful number, since it uses less digits than its factorization.

97434056521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236263350.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 97434056521 in words is "ninety-seven billion, four hundred thirty-four million, fifty-six thousand, five hundred twenty-one".