97900555061 has 4 divisors (see below), whose sum is σ = 101276436300. Its totient is φ = 94524673824.

The previous prime is 97900555057. The next prime is 97900555117. The reversal of 97900555061 is 16055500979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16055500979 = 7 ⋅2293642997.

It can be written as a sum of positive squares in 2 ways, for example, as 41206564036 + 56693991025 = 202994^2 + 238105^2 .

It is a cyclic number.

It is not a de Polignac number, because 97900555061 - 2² = 97900555057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 97900554997 and 97900555015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97900554061) 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, 1687940576 + ... + 1687940633.

It is an arithmetic number, because the mean of its divisors is an integer number (25319109075).

Almost surely, 2^97900555061 is an apocalyptic number.

It is an amenable number.

97900555061 is a deficient number, since it is larger than the sum of its proper divisors (3375881239).

97900555061 is a wasteful number, since it uses less digits than its factorization.

97900555061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375881238.

The product of its (nonzero) digits is 425250, while the sum is 47.

The spelling of 97900555061 in words is "ninety-seven billion, nine hundred million, five hundred fifty-five thousand, sixty-one".