61330397 has 4 divisors (see below), whose sum is σ = 63996960. Its totient is φ = 58663836.

The previous prime is 61330391. The next prime is 61330453. The reversal of 61330397 is 79303316.

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 61330397 - 2⁶ = 61330333 is a prime.

It is a super-2 number, since 2×61330397² = 7522835192355218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61330391) 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, 1333247 + ... + 1333292.

It is an arithmetic number, because the mean of its divisors is an integer number (15999240).

Almost surely, 2^61330397 is an apocalyptic number.

It is an amenable number.

61330397 is a deficient number, since it is larger than the sum of its proper divisors (2666563).

61330397 is a wasteful number, since it uses less digits than its factorization.

61330397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666562.

The product of its (nonzero) digits is 10206, while the sum is 32.

The square root of 61330397 is about 7831.3726127672. The cubic root of 61330397 is about 394.3591531310.

The spelling of 61330397 in words is "sixty-one million, three hundred thirty thousand, three hundred ninety-seven".