1986077397 has 16 divisors (see below), whose sum is σ = 2675566080. Its totient is φ = 1310345712.

The previous prime is 1986077339. The next prime is 1986077399. The reversal of 1986077397 is 7937706891.

It is not a de Polignac number, because 1986077397 - 2¹⁸ = 1985815253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986077399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390054 + ... + 395112.

It is an arithmetic number, because the mean of its divisors is an integer number (167222880).

Almost surely, 2^1986077397 is an apocalyptic number.

It is an amenable number.

1986077397 is a deficient number, since it is larger than the sum of its proper divisors (689488683).

1986077397 is a wasteful number, since it uses less digits than its factorization.

1986077397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6392.

The product of its (nonzero) digits is 4000752, while the sum is 57.

The square root of 1986077397 is about 44565.4282712508. The cubic root of 1986077397 is about 1256.9906761694.

The spelling of 1986077397 in words is "one billion, nine hundred eighty-six million, seventy-seven thousand, three hundred ninety-seven".