61362509 has 4 divisors (see below), whose sum is σ = 66082716. Its totient is φ = 56642304.

The previous prime is 61362473. The next prime is 61362517. The reversal of 61362509 is 90526316.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21949225 + 39413284 = 4685^2 + 6278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61362509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61362599) 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, 2360084 + ... + 2360109.

It is an arithmetic number, because the mean of its divisors is an integer number (16520679).

Almost surely, 2^61362509 is an apocalyptic number.

It is an amenable number.

61362509 is a deficient number, since it is larger than the sum of its proper divisors (4720207).

61362509 is a wasteful number, since it uses less digits than its factorization.

61362509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720206.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 61362509 is about 7833.4225597755. The cubic root of 61362509 is about 394.4279686624.

The spelling of 61362509 in words is "sixty-one million, three hundred sixty-two thousand, five hundred nine".