1389434551 has 2 divisors, whose sum is σ = 1389434552. Its totient is φ = 1389434550.

The previous prime is 1389434509. The next prime is 1389434593. The reversal of 1389434551 is 1554349831.

It is a balanced prime because it is at equal distance from previous prime (1389434509) and next prime (1389434593).

It is a cyclic number.

It is not a de Polignac number, because 1389434551 - 2¹¹ = 1389432503 is a prime.

It is a super-3 number, since 3×1389434551³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1389434498 and 1389434507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389431551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694717275 + 694717276.

It is an arithmetic number, because the mean of its divisors is an integer number (694717276).

Almost surely, 2^1389434551 is an apocalyptic number.

1389434551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389434551 is an equidigital number, since it uses as much as digits as its factorization.

1389434551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 43.

The square root of 1389434551 is about 37275.1197315314. The cubic root of 1389434551 is about 1115.8676780183.

The spelling of 1389434551 in words is "one billion, three hundred eighty-nine million, four hundred thirty-four thousand, five hundred fifty-one".