69621389 has 2 divisors, whose sum is σ = 69621390. Its totient is φ = 69621388.

The previous prime is 69621367. The next prime is 69621427. The reversal of 69621389 is 98312696.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69172489 + 448900 = 8317^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 69621389 - 2¹⁶ = 69555853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69621359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34810694 + 34810695.

It is an arithmetic number, because the mean of its divisors is an integer number (34810695).

Almost surely, 2^69621389 is an apocalyptic number.

It is an amenable number.

69621389 is a deficient number, since it is larger than the sum of its proper divisors (1).

69621389 is an equidigital number, since it uses as much as digits as its factorization.

69621389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 69621389 is about 8343.9432524437. The cubic root of 69621389 is about 411.3841558725.

The spelling of 69621389 in words is "sixty-nine million, six hundred twenty-one thousand, three hundred eighty-nine".