61995473 has 4 divisors (see below), whose sum is σ = 62411700. Its totient is φ = 61579248.

The previous prime is 61995463. The next prime is 61995497. The reversal of 61995473 is 37459916.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20367169 + 41628304 = 4513^2 + 6452^2 .

It is a cyclic number.

It is not a de Polignac number, because 61995473 - 2⁴ = 61995457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61995463) 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, 207890 + ... + 208187.

It is an arithmetic number, because the mean of its divisors is an integer number (15602925).

Almost surely, 2^61995473 is an apocalyptic number.

It is an amenable number.

61995473 is a deficient number, since it is larger than the sum of its proper divisors (416227).

61995473 is a wasteful number, since it uses less digits than its factorization.

61995473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416226.

The product of its digits is 204120, while the sum is 44.

The square root of 61995473 is about 7873.7204039768. The cubic root of 61995473 is about 395.7795277361.

The spelling of 61995473 in words is "sixty-one million, nine hundred ninety-five thousand, four hundred seventy-three".