61507871 has 2 divisors, whose sum is σ = 61507872. Its totient is φ = 61507870.

The previous prime is 61507867. The next prime is 61507879. The reversal of 61507871 is 17870516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61507871 - 2² = 61507867 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 (61507879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30753935 + 30753936.

It is an arithmetic number, because the mean of its divisors is an integer number (30753936).

Almost surely, 2^61507871 is an apocalyptic number.

61507871 is a deficient number, since it is larger than the sum of its proper divisors (1).

61507871 is an equidigital number, since it uses as much as digits as its factorization.

61507871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 61507871 is about 7842.6953912542. The cubic root of 61507871 is about 394.7391772771.

The spelling of 61507871 in words is "sixty-one million, five hundred seven thousand, eight hundred seventy-one".