1389520754 has 4 divisors (see below), whose sum is σ = 2084281134. Its totient is φ = 694760376.

The previous prime is 1389520753. The next prime is 1389520771. The reversal of 1389520754 is 4570259831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 819505129 + 570015625 = 28627^2 + 23875^2 .

It is not an unprimeable number, because it can be changed into a prime (1389520751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347380187 + ... + 347380190.

Almost surely, 2^1389520754 is an apocalyptic number.

1389520754 is a deficient number, since it is larger than the sum of its proper divisors (694760380).

1389520754 is an equidigital number, since it uses as much as digits as its factorization.

1389520754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694760379.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 1389520754 is about 37276.2760210834. The cubic root of 1389520754 is about 1115.8907543487.

The spelling of 1389520754 in words is "one billion, three hundred eighty-nine million, five hundred twenty thousand, seven hundred fifty-four".