961683551 has 2 divisors, whose sum is σ = 961683552. Its totient is φ = 961683550.

The previous prime is 961683533. The next prime is 961683559. The reversal of 961683551 is 155386169.

It is a strong prime.

It is an emirp because it is prime and its reverse (155386169) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 961683551 - 2⁶ = 961683487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961683559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480841775 + 480841776.

It is an arithmetic number, because the mean of its divisors is an integer number (480841776).

Almost surely, 2^961683551 is an apocalyptic number.

961683551 is a deficient number, since it is larger than the sum of its proper divisors (1).

961683551 is an equidigital number, since it uses as much as digits as its factorization.

961683551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The square root of 961683551 is about 31011.0230563263. The cubic root of 961683551 is about 987.0611587669.

The spelling of 961683551 in words is "nine hundred sixty-one million, six hundred eighty-three thousand, five hundred fifty-one".