1527478649 has 2 divisors, whose sum is σ = 1527478650. Its totient is φ = 1527478648.

The previous prime is 1527478643. The next prime is 1527478669. The reversal of 1527478649 is 9468747251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089330025 + 438148624 = 33005^2 + 20932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1527478649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1527478649.

It is not a weakly prime, because it can be changed into another prime (1527478643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763739324 + 763739325.

It is an arithmetic number, because the mean of its divisors is an integer number (763739325).

Almost surely, 2^1527478649 is an apocalyptic number.

It is an amenable number.

1527478649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1527478649 is an equidigital number, since it uses as much as digits as its factorization.

1527478649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 53.

The square root of 1527478649 is about 39082.9713430287. The cubic root of 1527478649 is about 1151.6620325881.

The spelling of 1527478649 in words is "one billion, five hundred twenty-seven million, four hundred seventy-eight thousand, six hundred forty-nine".