61599541 has 2 divisors, whose sum is σ = 61599542.
Its totient is φ = 61599540.
The previous prime is 61599533. The next prime is 61599557. The reversal of 61599541 is 14599516.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 57380625 + 4218916 = 7575^2 + 2054^2
It is a cyclic number.
It is not a de Polignac number, because 61599541 - 23 = 61599533 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 61599494 and 61599503.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (61599581) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30799770 + 30799771.
It is an arithmetic number, because the mean of its divisors is an integer number (30799771).
Almost surely, 261599541 is an apocalyptic number.
It is an amenable number.
61599541 is a deficient number, since it is larger than the sum of its proper divisors (1).
61599541 is an equidigital number, since it uses as much as digits as its factorization.
61599541 is an evil number, because the sum of its binary digits is even.
The product of its digits is 48600, while the sum is 40.
The square root of 61599541 is about 7848.5375070774.
The cubic root of 61599541 is about 394.9351835109.
The spelling of 61599541 in words is "sixty-one million, five hundred ninety-nine thousand, five hundred forty-one".