61719895 has 4 divisors (see below), whose sum is σ = 74063880. Its totient is φ = 49375912.

The previous prime is 61719893. The next prime is 61719901. The reversal of 61719895 is 59891716.

It is a happy number.

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 61719895 - 2¹ = 61719893 is a prime.

It is a super-2 number, since 2×61719895² = 7618690877622050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61719893) 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, 6171985 + ... + 6171994.

It is an arithmetic number, because the mean of its divisors is an integer number (18515970).

Almost surely, 2^61719895 is an apocalyptic number.

61719895 is a deficient number, since it is larger than the sum of its proper divisors (12343985).

61719895 is a wasteful number, since it uses less digits than its factorization.

61719895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12343984.

The product of its digits is 136080, while the sum is 46.

The square root of 61719895 is about 7856.2010539446. The cubic root of 61719895 is about 395.1922260453.

The spelling of 61719895 in words is "sixty-one million, seven hundred nineteen thousand, eight hundred ninety-five".