61573091 has 16 divisors (see below), whose sum is σ = 66493440. Its totient is φ = 56842560.

The previous prime is 61573079. The next prime is 61573111. The reversal of 61573091 is 19037516.

It is a cyclic number.

It is not a de Polignac number, because 61573091 - 2⁶ = 61573027 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61573591) 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, 142646 + ... + 143076.

It is an arithmetic number, because the mean of its divisors is an integer number (4155840).

Almost surely, 2^61573091 is an apocalyptic number.

61573091 is a deficient number, since it is larger than the sum of its proper divisors (4920349).

61573091 is a wasteful number, since it uses less digits than its factorization.

61573091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 61573091 is about 7846.8522988521. The cubic root of 61573091 is about 394.8786488305.

The spelling of 61573091 in words is "sixty-one million, five hundred seventy-three thousand, ninety-one".