61022987 has 4 divisors (see below), whose sum is σ = 61096560. Its totient is φ = 60949416.

The previous prime is 61022959. The next prime is 61022993. The reversal of 61022987 is 78922016.

It is a happy number.

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 61022987 - 2¹⁰ = 61021963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61022947) 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, 35528 + ... + 37205.

It is an arithmetic number, because the mean of its divisors is an integer number (15274140).

Almost surely, 2^61022987 is an apocalyptic number.

61022987 is a deficient number, since it is larger than the sum of its proper divisors (73573).

61022987 is an equidigital number, since it uses as much as digits as its factorization.

61022987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73572.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 61022987 is about 7811.7211291751. The cubic root of 61022987 is about 393.6991592374.

The spelling of 61022987 in words is "sixty-one million, twenty-two thousand, nine hundred eighty-seven".