1528313761 has 4 divisors (see below), whose sum is σ = 1645876372. Its totient is φ = 1410751152.

The previous prime is 1528313741. The next prime is 1528313771. The reversal of 1528313761 is 1673138251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1673138251 = 1439 ⋅1162709.

It can be written as a sum of positive squares in 2 ways, for example, as 456078736 + 1072235025 = 21356^2 + 32745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1528313761 - 2⁹ = 1528313249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1528313761.

It is not an unprimeable number, because it can be changed into a prime (1528313701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58781286 + ... + 58781311.

It is an arithmetic number, because the mean of its divisors is an integer number (411469093).

Almost surely, 2^1528313761 is an apocalyptic number.

It is an amenable number.

1528313761 is a deficient number, since it is larger than the sum of its proper divisors (117562611).

1528313761 is a wasteful number, since it uses less digits than its factorization.

1528313761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117562610.

The product of its digits is 30240, while the sum is 37.

The square root of 1528313761 is about 39093.6537177072. The cubic root of 1528313761 is about 1151.8718754694.

The spelling of 1528313761 in words is "one billion, five hundred twenty-eight million, three hundred thirteen thousand, seven hundred sixty-one".