61623929 has 4 divisors (see below), whose sum is σ = 65248884. Its totient is φ = 57998976.

The previous prime is 61623893. The next prime is 61623971. The reversal of 61623929 is 92932616.

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 22848400 + 38775529 = 4780^2 + 6227^2 .

It is a cyclic number.

It is not a de Polignac number, because 61623929 - 2⁸ = 61623673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61623892 and 61623901.

It is not an unprimeable number, because it can be changed into a prime (61623979) 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, 1812452 + ... + 1812485.

It is an arithmetic number, because the mean of its divisors is an integer number (16312221).

Almost surely, 2^61623929 is an apocalyptic number.

It is an amenable number.

61623929 is a deficient number, since it is larger than the sum of its proper divisors (3624955).

61623929 is a wasteful number, since it uses less digits than its factorization.

61623929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624954.

The product of its digits is 34992, while the sum is 38.

The square root of 61623929 is about 7850.0910185806. The cubic root of 61623929 is about 394.9872964990.

The spelling of 61623929 in words is "sixty-one million, six hundred twenty-three thousand, nine hundred twenty-nine".