1389754477 has 6 divisors (see below), whose sum is σ = 1394000174. Its totient is φ = 1385512920.

The previous prime is 1389754417. The next prime is 1389754481. The reversal of 1389754477 is 7744579831.

It can be written as a sum of positive squares in only one way, i.e., 1263731401 + 126023076 = 35549^2 + 11226^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1389754477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389754417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 741852 + ... + 743722.

Almost surely, 2^1389754477 is an apocalyptic number.

It is an amenable number.

1389754477 is a deficient number, since it is larger than the sum of its proper divisors (4245697).

1389754477 is an frugal number, since it uses more digits than its factorization.

1389754477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4139 (or 2268 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 55.

The square root of 1389754477 is about 37279.4108993155. The cubic root of 1389754477 is about 1115.9533166175.

The spelling of 1389754477 in words is "one billion, three hundred eighty-nine million, seven hundred fifty-four thousand, four hundred seventy-seven".