69021061 has 2 divisors, whose sum is σ = 69021062. Its totient is φ = 69021060.

The previous prime is 69021059. The next prime is 69021067. The reversal of 69021061 is 16012096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59985025 + 9036036 = 7745^2 + 3006^2 .

It is a cyclic number.

It is not a de Polignac number, because 69021061 - 2¹ = 69021059 is a prime.

Together with 69021059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69021067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34510530 + 34510531.

It is an arithmetic number, because the mean of its divisors is an integer number (34510531).

Almost surely, 2^69021061 is an apocalyptic number.

It is an amenable number.

69021061 is a deficient number, since it is larger than the sum of its proper divisors (1).

69021061 is an equidigital number, since it uses as much as digits as its factorization.

69021061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 69021061 is about 8307.8914894214. The cubic root of 69021061 is about 410.1983196816.

The spelling of 69021061 in words is "sixty-nine million, twenty-one thousand, sixty-one".