1389630551 has 2 divisors, whose sum is σ = 1389630552. Its totient is φ = 1389630550.

The previous prime is 1389630511. The next prime is 1389630559. The reversal of 1389630551 is 1550369831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389630551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389630499 and 1389630508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389630559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694815275 + 694815276.

It is an arithmetic number, because the mean of its divisors is an integer number (694815276).

Almost surely, 2^1389630551 is an apocalyptic number.

1389630551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389630551 is an equidigital number, since it uses as much as digits as its factorization.

1389630551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 1389630551 is about 37277.7487383560. The cubic root of 1389630551 is about 1115.9201453527.

The spelling of 1389630551 in words is "one billion, three hundred eighty-nine million, six hundred thirty thousand, five hundred fifty-one".