61191473 has 4 divisors (see below), whose sum is σ = 69933120. Its totient is φ = 52449828.

The previous prime is 61191439. The next prime is 61191497. The reversal of 61191473 is 37419116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61191473 - 2¹⁰ = 61190449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61191413) 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, 4370813 + ... + 4370826.

It is an arithmetic number, because the mean of its divisors is an integer number (17483280).

Almost surely, 2^61191473 is an apocalyptic number.

It is an amenable number.

61191473 is a deficient number, since it is larger than the sum of its proper divisors (8741647).

61191473 is an equidigital number, since it uses as much as digits as its factorization.

61191473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8741646.

The product of its digits is 4536, while the sum is 32.

The square root of 61191473 is about 7822.4978747201. The cubic root of 61191473 is about 394.0611640295.

The spelling of 61191473 in words is "sixty-one million, one hundred ninety-one thousand, four hundred seventy-three".