61819403 has 2 divisors, whose sum is σ = 61819404. Its totient is φ = 61819402.

The previous prime is 61819399. The next prime is 61819411. The reversal of 61819403 is 30491816.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61819403 - 2² = 61819399 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61819403.

It is not a weakly prime, because it can be changed into another prime (61819453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30909701 + 30909702.

It is an arithmetic number, because the mean of its divisors is an integer number (30909702).

Almost surely, 2^61819403 is an apocalyptic number.

61819403 is a deficient number, since it is larger than the sum of its proper divisors (1).

61819403 is an equidigital number, since it uses as much as digits as its factorization.

61819403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 61819403 is about 7862.5315897617. The cubic root of 61819403 is about 395.4044951098.

The spelling of 61819403 in words is "sixty-one million, eight hundred nineteen thousand, four hundred three".