61506023 has 4 divisors (see below), whose sum is σ = 62666568. Its totient is φ = 60345480.

The previous prime is 61506007. The next prime is 61506037. The reversal of 61506023 is 32060516.

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

It is a cyclic number.

It is not a de Polignac number, because 61506023 - 2⁴ = 61506007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61506023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61506073) 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, 580193 + ... + 580298.

It is an arithmetic number, because the mean of its divisors is an integer number (15666642).

Almost surely, 2^61506023 is an apocalyptic number.

61506023 is a deficient number, since it is larger than the sum of its proper divisors (1160545).

61506023 is a wasteful number, since it uses less digits than its factorization.

61506023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160544.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 61506023 is about 7842.5775737317. The cubic root of 61506023 is about 394.7352239332.

Adding to 61506023 its reverse (32060516), we get a palindrome (93566539).

The spelling of 61506023 in words is "sixty-one million, five hundred six thousand, twenty-three".