61026091 has 4 divisors (see below), whose sum is σ = 69744112. Its totient is φ = 52308072.

The previous prime is 61026089. The next prime is 61026101. The reversal of 61026091 is 19062016.

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 61026091 - 2¹ = 61026089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61026041) 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, 4359000 + ... + 4359013.

It is an arithmetic number, because the mean of its divisors is an integer number (17436028).

Almost surely, 2^61026091 is an apocalyptic number.

61026091 is a deficient number, since it is larger than the sum of its proper divisors (8718021).

61026091 is an equidigital number, since it uses as much as digits as its factorization.

61026091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8718020.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 61026091 is about 7811.9198024557. The cubic root of 61026091 is about 393.7058344349.

The spelling of 61026091 in words is "sixty-one million, twenty-six thousand, ninety-one".