61157023 has 4 divisors (see below), whose sum is σ = 63816048. Its totient is φ = 58498000.

The previous prime is 61157021. The next prime is 61157039. The reversal of 61157023 is 32075116.

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 61157023 - 2¹ = 61157021 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 (61157021) 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, 1329478 + ... + 1329523.

It is an arithmetic number, because the mean of its divisors is an integer number (15954012).

Almost surely, 2^61157023 is an apocalyptic number.

61157023 is a deficient number, since it is larger than the sum of its proper divisors (2659025).

61157023 is a wasteful number, since it uses less digits than its factorization.

61157023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659024.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61157023 is about 7820.2955826490. The cubic root of 61157023 is about 393.9871997181.

The spelling of 61157023 in words is "sixty-one million, one hundred fifty-seven thousand, twenty-three".