61023997 has 4 divisors (see below), whose sum is σ = 61166016. Its totient is φ = 60881980.

The previous prime is 61023983. The next prime is 61024013. The reversal of 61023997 is 79932016.

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 61023997 - 2¹¹ = 61021949 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 (61023197) 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, 70363 + ... + 71224.

It is an arithmetic number, because the mean of its divisors is an integer number (15291504).

Almost surely, 2^61023997 is an apocalyptic number.

It is an amenable number.

61023997 is a deficient number, since it is larger than the sum of its proper divisors (142019).

61023997 is a wasteful number, since it uses less digits than its factorization.

61023997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142018.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 61023997 is about 7811.7857753525. The cubic root of 61023997 is about 393.7013312820.

The spelling of 61023997 in words is "sixty-one million, twenty-three thousand, nine hundred ninety-seven".