306121249097 has 4 divisors (see below), whose sum is σ = 307890736260. Its totient is φ = 304351761936.

The previous prime is 306121249079. The next prime is 306121249111. The reversal of 306121249097 is 790942121603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 790942121603 = 130649 ⋅6053947.

It can be written as a sum of positive squares in 2 ways, for example, as 274601152576 + 31520096521 = 524024^2 + 177539^2 .

It is a cyclic number.

It is not a de Polignac number, because 306121249097 - 2¹⁸ = 306120986953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306121249067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884743322 + ... + 884743667.

It is an arithmetic number, because the mean of its divisors is an integer number (76972684065).

Almost surely, 2^306121249097 is an apocalyptic number.

It is an amenable number.

306121249097 is a deficient number, since it is larger than the sum of its proper divisors (1769487163).

306121249097 is a wasteful number, since it uses less digits than its factorization.

306121249097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769487162.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 306121249097 in words is "three hundred six billion, one hundred twenty-one million, two hundred forty-nine thousand, ninety-seven".