61124009 has 4 divisors (see below), whose sum is σ = 61140816. Its totient is φ = 61107204.

The previous prime is 61124003. The next prime is 61124023. The reversal of 61124009 is 90042116.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61124009 - 2²⁴ = 44346793 is a prime.

It is a super-2 number, since 2×61124009² = 7472288952464162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61124003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419 + ... + 11064.

It is an arithmetic number, because the mean of its divisors is an integer number (15285204).

Almost surely, 2^61124009 is an apocalyptic number.

It is an amenable number.

61124009 is a deficient number, since it is larger than the sum of its proper divisors (16807).

61124009 is a wasteful number, since it uses less digits than its factorization.

61124009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16806.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 61124009 is about 7818.1845079277. The cubic root of 61124009 is about 393.9162924372.

The spelling of 61124009 in words is "sixty-one million, one hundred twenty-four thousand, nine".