61279693 has 4 divisors (see below), whose sum is σ = 64504960. Its totient is φ = 58054428.

The previous prime is 61279663. The next prime is 61279703. The reversal of 61279693 is 39697216.

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 61279693 - 2¹³ = 61271501 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 (61279663) 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, 1612605 + ... + 1612642.

It is an arithmetic number, because the mean of its divisors is an integer number (16126240).

Almost surely, 2^61279693 is an apocalyptic number.

It is an amenable number.

61279693 is a deficient number, since it is larger than the sum of its proper divisors (3225267).

61279693 is a wasteful number, since it uses less digits than its factorization.

61279693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225266.

The product of its digits is 122472, while the sum is 43.

The square root of 61279693 is about 7828.1347075788. The cubic root of 61279693 is about 394.2504462996.

The spelling of 61279693 in words is "sixty-one million, two hundred seventy-nine thousand, six hundred ninety-three".