157030661 has 2 divisors, whose sum is σ = 157030662. Its totient is φ = 157030660.

The previous prime is 157030651. The next prime is 157030667. The reversal of 157030661 is 166030751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123321025 + 33709636 = 11105^2 + 5806^2 .

It is a cyclic number.

It is not a de Polignac number, because 157030661 - 2⁶ = 157030597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157030667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78515330 + 78515331.

It is an arithmetic number, because the mean of its divisors is an integer number (78515331).

Almost surely, 2^157030661 is an apocalyptic number.

It is an amenable number.

157030661 is a deficient number, since it is larger than the sum of its proper divisors (1).

157030661 is an equidigital number, since it uses as much as digits as its factorization.

157030661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 157030661 is about 12531.1875335101. The cubic root of 157030661 is about 539.5041871017.

The spelling of 157030661 in words is "one hundred fifty-seven million, thirty thousand, six hundred sixty-one".