61919396 has 24 divisors (see below), whose sum is σ = 135097536. Its totient is φ = 24124320.

The previous prime is 61919393. The next prime is 61919449. The reversal of 61919396 is 69391916.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (61919393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100211 + ... + 100826.

It is an arithmetic number, because the mean of its divisors is an integer number (5629064).

Almost surely, 2^61919396 is an apocalyptic number.

It is an amenable number.

61919396 is an abundant number, since it is smaller than the sum of its proper divisors (73178140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61919396 is a wasteful number, since it uses less digits than its factorization.

61919396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201059 (or 201057 counting only the distinct ones).

The product of its digits is 78732, while the sum is 44.

The square root of 61919396 is about 7868.8878502619. The cubic root of 61919396 is about 395.6175694385.

The spelling of 61919396 in words is "sixty-one million, nine hundred nineteen thousand, three hundred ninety-six".