61472971 has 4 divisors (see below), whose sum is σ = 70254832. Its totient is φ = 52691112.

The previous prime is 61472963. The next prime is 61472987. The reversal of 61472971 is 17927416.

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 61472971 - 2³ = 61472963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61472971.

It is not an unprimeable number, because it can be changed into a prime (61472171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4390920 + ... + 4390933.

It is an arithmetic number, because the mean of its divisors is an integer number (17563708).

Almost surely, 2^61472971 is an apocalyptic number.

61472971 is a deficient number, since it is larger than the sum of its proper divisors (8781861).

61472971 is an equidigital number, since it uses as much as digits as its factorization.

61472971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8781860.

The product of its digits is 21168, while the sum is 37.

The square root of 61472971 is about 7840.4700751932. The cubic root of 61472971 is about 394.6645038871.

The spelling of 61472971 in words is "sixty-one million, four hundred seventy-two thousand, nine hundred seventy-one".