97022819381 has 4 divisors (see below), whose sum is σ = 97912937100. Its totient is φ = 96132701664.

The previous prime is 97022819371. The next prime is 97022819417. The reversal of 97022819381 is 18391822079.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18391822079 = 17 ⋅1081871887.

It can be written as a sum of positive squares in 2 ways, for example, as 44844838756 + 52177980625 = 211766^2 + 228425^2 .

It is a cyclic number.

It is not a de Polignac number, because 97022819381 - 2¹⁰ = 97022818357 is a prime.

It is a super-2 number, since 2×97022819381² (a number of 23 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 (97022819321) 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, 445058696 + ... + 445058913.

It is an arithmetic number, because the mean of its divisors is an integer number (24478234275).

Almost surely, 2^97022819381 is an apocalyptic number.

It is an amenable number.

97022819381 is a deficient number, since it is larger than the sum of its proper divisors (890117719).

97022819381 is a wasteful number, since it uses less digits than its factorization.

97022819381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890117718.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 97022819381 in words is "ninety-seven billion, twenty-two million, eight hundred nineteen thousand, three hundred eighty-one".