49351661 has 2 divisors, whose sum is σ = 49351662. Its totient is φ = 49351660.

The previous prime is 49351619. The next prime is 49351667. The reversal of 49351661 is 16615394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33709636 + 15642025 = 5806^2 + 3955^2 .

It is a cyclic number.

It is not a de Polignac number, because 49351661 - 2¹⁸ = 49089517 is a prime.

It is a Sophie Germain 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 (49351667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24675830 + 24675831.

It is an arithmetic number, because the mean of its divisors is an integer number (24675831).

Almost surely, 2^49351661 is an apocalyptic number.

It is an amenable number.

49351661 is a deficient number, since it is larger than the sum of its proper divisors (1).

49351661 is an equidigital number, since it uses as much as digits as its factorization.

49351661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 49351661 is about 7025.0737362678. The cubic root of 49351661 is about 366.8038831706.

The spelling of 49351661 in words is "forty-nine million, three hundred fifty-one thousand, six hundred sixty-one".