61006091 has 4 divisors (see below), whose sum is σ = 61778400. Its totient is φ = 60233784.

The previous prime is 61006069. The next prime is 61006103. The reversal of 61006091 is 19060016.

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 61006091 - 2¹⁴ = 60989707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61006291) 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, 386036 + ... + 386193.

It is an arithmetic number, because the mean of its divisors is an integer number (15444600).

Almost surely, 2^61006091 is an apocalyptic number.

61006091 is a deficient number, since it is larger than the sum of its proper divisors (772309).

61006091 is an equidigital number, since it uses as much as digits as its factorization.

61006091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772308.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 61006091 is about 7810.6396024910. The cubic root of 61006091 is about 393.6628201716.

The spelling of 61006091 in words is "sixty-one million, six thousand, ninety-one".