61690199 has 8 divisors (see below), whose sum is σ = 63520800. Its totient is φ = 59875200.

The previous prime is 61690177. The next prime is 61690249. The reversal of 61690199 is 99109616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61690199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61690129) 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, 4379 + ... + 11939.

It is an arithmetic number, because the mean of its divisors is an integer number (7940100).

Almost surely, 2^61690199 is an apocalyptic number.

61690199 is a deficient number, since it is larger than the sum of its proper divisors (1830601).

61690199 is a wasteful number, since it uses less digits than its factorization.

61690199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7801.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 61690199 is about 7854.3108545562. The cubic root of 61690199 is about 395.1288347567.

The spelling of 61690199 in words is "sixty-one million, six hundred ninety thousand, one hundred ninety-nine".