3897992746 has 4 divisors (see below), whose sum is σ = 5846989122. Its totient is φ = 1948996372.

The previous prime is 3897992741. The next prime is 3897992771. The reversal of 3897992746 is 6472997983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6472997983 = 29 ⋅223206827.

It can be written as a sum of positive squares in only one way, i.e., 2391699025 + 1506293721 = 48905^2 + 38811^2 .

It is not an unprimeable number, because it can be changed into a prime (3897992741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974498185 + ... + 974498188.

Almost surely, 2^3897992746 is an apocalyptic number.

3897992746 is a deficient number, since it is larger than the sum of its proper divisors (1948996376).

3897992746 is a wasteful number, since it uses less digits than its factorization.

3897992746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948996375.

The product of its digits is 41150592, while the sum is 64.

The square root of 3897992746 is about 62433.9070217458. The cubic root of 3897992746 is about 1573.7908241291.

The spelling of 3897992746 in words is "three billion, eight hundred ninety-seven million, nine hundred ninety-two thousand, seven hundred forty-six".