61001803 has 2 divisors, whose sum is σ = 61001804. Its totient is φ = 61001802.

The previous prime is 61001767. The next prime is 61001827. The reversal of 61001803 is 30810016.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61001803 is a prime.

It is not a weakly prime, because it can be changed into another prime (61001833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30500901 + 30500902.

It is an arithmetic number, because the mean of its divisors is an integer number (30500902).

Almost surely, 2^61001803 is an apocalyptic number.

61001803 is a deficient number, since it is larger than the sum of its proper divisors (1).

61001803 is an equidigital number, since it uses as much as digits as its factorization.

61001803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 61001803 is about 7810.3651003010. The cubic root of 61001803 is about 393.6535966897.

Adding to 61001803 its reverse (30810016), we get a palindrome (91811819).

The spelling of 61001803 in words is "sixty-one million, one thousand, eight hundred three".