69690047621357 has 2 divisors, whose sum is σ = 69690047621358. Its totient is φ = 69690047621356.

The previous prime is 69690047621317. The next prime is 69690047621387. The reversal of 69690047621357 is 75312674009696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49847709004681 + 19842338616676 = 7060291^2 + 4454474^2 .

It is a cyclic number.

It is not a de Polignac number, because 69690047621357 - 2¹² = 69690047617261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 69690047621293 and 69690047621302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69690047621317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34845023810678 + 34845023810679.

It is an arithmetic number, because the mean of its divisors is an integer number (34845023810679).

Almost surely, 2^{69690047621357} is an apocalyptic number.

It is an amenable number.

69690047621357 is a deficient number, since it is larger than the sum of its proper divisors (1).

69690047621357 is an equidigital number, since it uses as much as digits as its factorization.

69690047621357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102876480, while the sum is 65.

The spelling of 69690047621357 in words is "sixty-nine trillion, six hundred ninety billion, forty-seven million, six hundred twenty-one thousand, three hundred fifty-seven".