61153091 has 4 divisors (see below), whose sum is σ = 61193400. Its totient is φ = 61112784.

The previous prime is 61153061. The next prime is 61153093. The reversal of 61153091 is 19035116.

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 61153091 - 2¹⁰ = 61152067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61153091.

It is not an unprimeable number, because it can be changed into a prime (61153093) 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, 17786 + ... + 20943.

It is an arithmetic number, because the mean of its divisors is an integer number (15298350).

Almost surely, 2^61153091 is an apocalyptic number.

61153091 is a deficient number, since it is larger than the sum of its proper divisors (40309).

61153091 is a wasteful number, since it uses less digits than its factorization.

61153091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40308.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 61153091 is about 7820.0441814609. The cubic root of 61153091 is about 393.9787559298.

The spelling of 61153091 in words is "sixty-one million, one hundred fifty-three thousand, ninety-one".