61371947 has 16 divisors (see below), whose sum is σ = 75892992. Its totient is φ = 48327840.

The previous prime is 61371941. The next prime is 61371953. The reversal of 61371947 is 74917316.

It is an interprime number because it is at equal distance from previous prime (61371941) and next prime (61371953).

It is a cyclic number.

It is not a de Polignac number, because 61371947 - 2¹⁶ = 61306411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61371947.

It is not an unprimeable number, because it can be changed into a prime (61371941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19172 + ... + 22142.

It is an arithmetic number, because the mean of its divisors is an integer number (4743312).

Almost surely, 2^61371947 is an apocalyptic number.

61371947 is a deficient number, since it is larger than the sum of its proper divisors (14521045).

61371947 is a wasteful number, since it uses less digits than its factorization.

61371947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218.

The product of its digits is 31752, while the sum is 38.

The square root of 61371947 is about 7834.0249552832. The cubic root of 61371947 is about 394.4481895888.

The spelling of 61371947 in words is "sixty-one million, three hundred seventy-one thousand, nine hundred forty-seven".