69206381 has 2 divisors, whose sum is σ = 69206382. Its totient is φ = 69206380.

The previous prime is 69206369. The next prime is 69206407. The reversal of 69206381 is 18360296.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63282025 + 5924356 = 7955^2 + 2434^2 .

It is a cyclic number.

It is not a de Polignac number, because 69206381 - 2²⁶ = 2097517 is a prime.

It is a super-2 number, since 2×69206381² = 9579046342234322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69206281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34603190 + 34603191.

It is an arithmetic number, because the mean of its divisors is an integer number (34603191).

Almost surely, 2^69206381 is an apocalyptic number.

It is an amenable number.

69206381 is a deficient number, since it is larger than the sum of its proper divisors (1).

69206381 is an equidigital number, since it uses as much as digits as its factorization.

69206381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 69206381 is about 8319.0372640108. The cubic root of 69206381 is about 410.5651160252.

The spelling of 69206381 in words is "sixty-nine million, two hundred six thousand, three hundred eighty-one".