97072205421 has 4 divisors (see below), whose sum is σ = 129429607232. Its totient is φ = 64714803612.

The previous prime is 97072205401. The next prime is 97072205437. The reversal of 97072205421 is 12450227079.

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 97072205421 - 2¹⁴ = 97072189037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97072205421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97072205401) 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, 16178700901 + ... + 16178700906.

It is an arithmetic number, because the mean of its divisors is an integer number (32357401808).

Almost surely, 2^97072205421 is an apocalyptic number.

It is an amenable number.

97072205421 is a deficient number, since it is larger than the sum of its proper divisors (32357401811).

97072205421 is a wasteful number, since it uses less digits than its factorization.

97072205421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32357401810.

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 97072205421 in words is "ninety-seven billion, seventy-two million, two hundred five thousand, four hundred twenty-one".