101520649 has 2 divisors, whose sum is σ = 101520650. Its totient is φ = 101520648.

The previous prime is 101520631. The next prime is 101520659. The reversal of 101520649 is 946025101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101364624 + 156025 = 10068^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 101520649 - 2¹⁹ = 100996361 is a prime.

It is not a weakly prime, because it can be changed into another prime (101520659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50760324 + 50760325.

It is an arithmetic number, because the mean of its divisors is an integer number (50760325).

Almost surely, 2^101520649 is an apocalyptic number.

It is an amenable number.

101520649 is a deficient number, since it is larger than the sum of its proper divisors (1).

101520649 is an equidigital number, since it uses as much as digits as its factorization.

101520649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 101520649 is about 10075.7455803529. The cubic root of 101520649 is about 466.4997999208.

The spelling of 101520649 in words is "one hundred one million, five hundred twenty thousand, six hundred forty-nine".