540699961 has 2 divisors, whose sum is σ = 540699962. Its totient is φ = 540699960.

The previous prime is 540699959. The next prime is 540699989. The reversal of 540699961 is 169996045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317018025 + 223681936 = 17805^2 + 14956^2 .

It is a cyclic number.

It is not a de Polignac number, because 540699961 - 2¹ = 540699959 is a prime.

Together with 540699959, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (540699361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270349980 + 270349981.

It is an arithmetic number, because the mean of its divisors is an integer number (270349981).

Almost surely, 2^540699961 is an apocalyptic number.

It is an amenable number.

540699961 is a deficient number, since it is larger than the sum of its proper divisors (1).

540699961 is an equidigital number, since it uses as much as digits as its factorization.

540699961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 540699961 is about 23252.9559626298. The cubic root of 540699961 is about 814.6769824088.

The spelling of 540699961 in words is "five hundred forty million, six hundred ninety-nine thousand, nine hundred sixty-one".