61011287 has 2 divisors, whose sum is σ = 61011288. Its totient is φ = 61011286.

The previous prime is 61011271. The next prime is 61011343. The reversal of 61011287 is 78211016.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61011287 - 2⁴ = 61011271 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 (61011227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30505643 + 30505644.

It is an arithmetic number, because the mean of its divisors is an integer number (30505644).

Almost surely, 2^61011287 is an apocalyptic number.

61011287 is a deficient number, since it is larger than the sum of its proper divisors (1).

61011287 is an equidigital number, since it uses as much as digits as its factorization.

61011287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 61011287 is about 7810.9722186166. The cubic root of 61011287 is about 393.6739961810.

The spelling of 61011287 in words is "sixty-one million, eleven thousand, two hundred eighty-seven".