61447967 has 8 divisors (see below), whose sum is σ = 70317600. Its totient is φ = 52601184.

The previous prime is 61447949. The next prime is 61448021. The reversal of 61447967 is 76974416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61447967 - 2¹⁰ = 61446943 is a prime.

It is a super-3 number, since 3×61447967³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61447907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509 + ... + 11097.

It is an arithmetic number, because the mean of its divisors is an integer number (8789700).

Almost surely, 2^61447967 is an apocalyptic number.

61447967 is a deficient number, since it is larger than the sum of its proper divisors (8869633).

61447967 is a wasteful number, since it uses less digits than its factorization.

61447967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11425.

The product of its digits is 254016, while the sum is 44.

The square root of 61447967 is about 7838.8753657652. The cubic root of 61447967 is about 394.6109869818.

The spelling of 61447967 in words is "sixty-one million, four hundred forty-seven thousand, nine hundred sixty-seven".