61229999 has 8 divisors (see below), whose sum is σ = 62601552. Its totient is φ = 59866560.

The previous prime is 61229983. The next prime is 61230007. The reversal of 61229999 is 99992216.

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 61229999 - 2⁴ = 61229983 is a prime.

It is a super-2 number, since 2×61229999² = 7498225555080002, which contains 22 as substring.

It is a Duffinian number.

61229999 is a modest number, since divided by 9999 gives 6122 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61229969) 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, 14744 + ... + 18434.

It is an arithmetic number, because the mean of its divisors is an integer number (7825194).

Almost surely, 2^61229999 is an apocalyptic number.

61229999 is a deficient number, since it is larger than the sum of its proper divisors (1371553).

61229999 is a wasteful number, since it uses less digits than its factorization.

61229999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4057.

The product of its digits is 157464, while the sum is 47.

The square root of 61229999 is about 7824.9599998978. The cubic root of 61229999 is about 394.1438466577.

The spelling of 61229999 in words is "sixty-one million, two hundred twenty-nine thousand, nine hundred ninety-nine".