61099699 has 2 divisors, whose sum is σ = 61099700. Its totient is φ = 61099698.

The previous prime is 61099673. The next prime is 61099721. The reversal of 61099699 is 99699016.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61099699 - 2¹¹ = 61097651 is a prime.

It is not a weakly prime, because it can be changed into another prime (61099669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30549849 + 30549850.

It is an arithmetic number, because the mean of its divisors is an integer number (30549850).

Almost surely, 2^61099699 is an apocalyptic number.

61099699 is a deficient number, since it is larger than the sum of its proper divisors (1).

61099699 is an equidigital number, since it uses as much as digits as its factorization.

61099699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 61099699 is about 7816.6296445463. The cubic root of 61099699 is about 393.8640632340.

The spelling of 61099699 in words is "sixty-one million, ninety-nine thousand, six hundred ninety-nine".