61531093 has 8 divisors (see below), whose sum is σ = 66771936. Its totient is φ = 56362800.

The previous prime is 61531073. The next prime is 61531097. The reversal of 61531093 is 39013516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61531093 - 2⁵ = 61531061 is a prime.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61531097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16363 + ... + 19768.

It is an arithmetic number, because the mean of its divisors is an integer number (8346492).

Almost surely, 2^61531093 is an apocalyptic number.

It is an amenable number.

61531093 is a deficient number, since it is larger than the sum of its proper divisors (5240843).

61531093 is a wasteful number, since it uses less digits than its factorization.

61531093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36275.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 61531093 is about 7844.1757374500. The cubic root of 61531093 is about 394.7888483174.

The spelling of 61531093 in words is "sixty-one million, five hundred thirty-one thousand, ninety-three".