61899305 has 8 divisors (see below), whose sum is σ = 79993032. Its totient is φ = 45710208.

The previous prime is 61899301. The next prime is 61899307. The reversal of 61899305 is 50399816.

It can be written as a sum of positive squares in 4 ways, for example, as 135424 + 61763881 = 368^2 + 7859^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61899305 - 2² = 61899301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61899301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476084 + ... + 476213.

It is an arithmetic number, because the mean of its divisors is an integer number (9999129).

Almost surely, 2^61899305 is an apocalyptic number.

61899305 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61899305 is a deficient number, since it is larger than the sum of its proper divisors (18093727).

61899305 is a wasteful number, since it uses less digits than its factorization.

61899305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952315.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 61899305 is about 7867.6111368064. The cubic root of 61899305 is about 395.5747761033.

The spelling of 61899305 in words is "sixty-one million, eight hundred ninety-nine thousand, three hundred five".