61997774 has 8 divisors (see below), whose sum is σ = 93053448. Its totient is φ = 30979960.

The previous prime is 61997711. The next prime is 61997797. The reversal of 61997774 is 47779916.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4937 + ... + 12180.

It is an arithmetic number, because the mean of its divisors is an integer number (11631681).

Almost surely, 2^61997774 is an apocalyptic number.

61997774 is a deficient number, since it is larger than the sum of its proper divisors (31055674).

61997774 is a wasteful number, since it uses less digits than its factorization.

61997774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18930.

The product of its digits is 666792, while the sum is 50.

The square root of 61997774 is about 7873.8665216017. The cubic root of 61997774 is about 395.7844242088.

The spelling of 61997774 in words is "sixty-one million, nine hundred ninety-seven thousand, seven hundred seventy-four".