61007071 has 4 divisors (see below), whose sum is σ = 61024600. Its totient is φ = 60989544.

The previous prime is 61007069. The next prime is 61007113. The reversal of 61007071 is 17070016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61007071 - 2¹ = 61007069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61007041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1581 + ... + 11158.

It is an arithmetic number, because the mean of its divisors is an integer number (15256150).

Almost surely, 2^61007071 is an apocalyptic number.

61007071 is a deficient number, since it is larger than the sum of its proper divisors (17529).

61007071 is a wasteful number, since it uses less digits than its factorization.

61007071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17528.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 61007071 is about 7810.7023371781. The cubic root of 61007071 is about 393.6649280895.

Adding to 61007071 its reverse (17070016), we get a palindrome (78077087).

The spelling of 61007071 in words is "sixty-one million, seven thousand, seventy-one".