61919063 has 4 divisors (see below), whose sum is σ = 62052120. Its totient is φ = 61786008.

The previous prime is 61919057. The next prime is 61919101. The reversal of 61919063 is 36091916.

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 61919063 - 2⁸ = 61918807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61919003) 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, 65828 + ... + 66761.

It is an arithmetic number, because the mean of its divisors is an integer number (15513030).

Almost surely, 2^61919063 is an apocalyptic number.

61919063 is a deficient number, since it is larger than the sum of its proper divisors (133057).

61919063 is a wasteful number, since it uses less digits than its factorization.

61919063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133056.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 61919063 is about 7868.8666909537. The cubic root of 61919063 is about 395.6168602322.

The spelling of 61919063 in words is "sixty-one million, nine hundred nineteen thousand, sixty-three".