97427463661 has 4 divisors (see below), whose sum is σ = 106284505824. Its totient is φ = 88570421500.

The previous prime is 97427463631. The next prime is 97427463671. The reversal of 97427463661 is 16636472479.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16636472479 = 11 ⋅1512406589.

It is not a de Polignac number, because 97427463661 - 2⁷ = 97427463533 is a prime.

It is a super-2 number, since 2×97427463661² (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 (97427463631) 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, 4428521065 + ... + 4428521086.

It is an arithmetic number, because the mean of its divisors is an integer number (26571126456).

Almost surely, 2^97427463661 is an apocalyptic number.

It is an amenable number.

97427463661 is a deficient number, since it is larger than the sum of its proper divisors (8857042163).

97427463661 is a wasteful number, since it uses less digits than its factorization.

97427463661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8857042162.

The product of its digits is 9144576, while the sum is 55.

The spelling of 97427463661 in words is "ninety-seven billion, four hundred twenty-seven million, four hundred sixty-three thousand, six hundred sixty-one".