61442077 has 4 divisors (see below), whose sum is σ = 61457760. Its totient is φ = 61426396.

The previous prime is 61442053. The next prime is 61442081. The reversal of 61442077 is 77024416.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61442077 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 (61442027) 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, 3624 + ... + 11662.

It is an arithmetic number, because the mean of its divisors is an integer number (15364440).

It is a 3918-hyperperfect number.

Almost surely, 2^61442077 is an apocalyptic number.

It is an amenable number.

61442077 is a deficient number, since it is larger than the sum of its proper divisors (15683).

61442077 is an equidigital number, since it uses as much as digits as its factorization.

61442077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15682.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 61442077 is about 7838.4996651145. The cubic root of 61442077 is about 394.5983783033.

The spelling of 61442077 in words is "sixty-one million, four hundred forty-two thousand, seventy-seven".