61618597 has 4 divisors (see below), whose sum is σ = 62663040. Its totient is φ = 60574156.

The previous prime is 61618573. The next prime is 61618603. The reversal of 61618597 is 79581616.

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 a de Polignac number, because none of the positive numbers 2^k-61618597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61618517) 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, 522133 + ... + 522250.

It is an arithmetic number, because the mean of its divisors is an integer number (15665760).

Almost surely, 2^61618597 is an apocalyptic number.

It is an amenable number.

61618597 is a deficient number, since it is larger than the sum of its proper divisors (1044443).

61618597 is a wasteful number, since it uses less digits than its factorization.

61618597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044442.

The product of its digits is 90720, while the sum is 43.

The square root of 61618597 is about 7849.7513973374. The cubic root of 61618597 is about 394.9759041008.

The spelling of 61618597 in words is "sixty-one million, six hundred eighteen thousand, five hundred ninety-seven".