61202009 has 4 divisors (see below), whose sum is σ = 66765840. Its totient is φ = 55638180.

The previous prime is 61202003. The next prime is 61202017. The reversal of 61202009 is 90020216.

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 61202009 - 2¹⁶ = 61136473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (61202003) 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, 2781899 + ... + 2781920.

It is an arithmetic number, because the mean of its divisors is an integer number (16691460).

Almost surely, 2^61202009 is an apocalyptic number.

It is an amenable number.

61202009 is a deficient number, since it is larger than the sum of its proper divisors (5563831).

61202009 is a wasteful number, since it uses less digits than its factorization.

61202009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5563830.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 61202009 is about 7823.1712879113. The cubic root of 61202009 is about 394.0837793274.

The spelling of 61202009 in words is "sixty-one million, two hundred two thousand, nine".