1997407774 has 8 divisors (see below), whose sum is σ = 3006699480. Its totient is φ = 995174616.

The previous prime is 1997407751. The next prime is 1997407781. The reversal of 1997407774 is 4777047991.

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, 1763929 + ... + 1765060.

It is an arithmetic number, because the mean of its divisors is an integer number (375837435).

Almost surely, 2^1997407774 is an apocalyptic number.

1997407774 is a deficient number, since it is larger than the sum of its proper divisors (1009291706).

1997407774 is a wasteful number, since it uses less digits than its factorization.

1997407774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3529274.

The product of its (nonzero) digits is 3111696, while the sum is 55.

The square root of 1997407774 is about 44692.3681851835. The cubic root of 1997407774 is about 1259.3764812023.

The spelling of 1997407774 in words is "one billion, nine hundred ninety-seven million, four hundred seven thousand, seven hundred seventy-four".