153402661 has 2 divisors, whose sum is σ = 153402662. Its totient is φ = 153402660.

The previous prime is 153402647. The next prime is 153402673. The reversal of 153402661 is 166204351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116424100 + 36978561 = 10790^2 + 6081^2 .

It is an emirp because it is prime and its reverse (166204351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 153402661 - 2¹¹ = 153400613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153402631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76701330 + 76701331.

It is an arithmetic number, because the mean of its divisors is an integer number (76701331).

Almost surely, 2^153402661 is an apocalyptic number.

It is an amenable number.

153402661 is a deficient number, since it is larger than the sum of its proper divisors (1).

153402661 is an equidigital number, since it uses as much as digits as its factorization.

153402661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 153402661 is about 12385.5827880645. The cubic root of 153402661 is about 535.3169124202.

The spelling of 153402661 in words is "one hundred fifty-three million, four hundred two thousand, six hundred sixty-one".