61541963 has 4 divisors (see below), whose sum is σ = 70333680.
Its totient is φ = 52750248.
The previous prime is 61541939. The next prime is 61541981. The reversal of 61541963 is 36914516.
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 61541963 - 26 = 61541899 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (61541923) 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, 4395848 + ... + 4395861.
It is an arithmetic number, because the mean of its divisors is an integer number (17583420).
Almost surely, 261541963 is an apocalyptic number.
61541963 is a deficient number, since it is larger than the sum of its proper divisors (8791717).
61541963 is an equidigital number, since it uses as much as digits as its factorization.
61541963 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 8791716.
The product of its digits is 19440, while the sum is 35.
The square root of 61541963 is about 7844.8685776117.
The cubic root of 61541963 is about 394.8120945706.
The spelling of 61541963 in words is "sixty-one million, five hundred forty-one thousand, nine hundred sixty-three".