1387320951 has 16 divisors (see below), whose sum is σ = 1903344480. Its totient is φ = 898435200.

The previous prime is 1387320943. The next prime is 1387320973. The reversal of 1387320951 is 1590237831.

It is not a de Polignac number, because 1387320951 - 2³ = 1387320943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387324951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27136 + ... + 59253.

It is an arithmetic number, because the mean of its divisors is an integer number (118959030).

Almost surely, 2^1387320951 is an apocalyptic number.

1387320951 is a deficient number, since it is larger than the sum of its proper divisors (516023529).

1387320951 is a wasteful number, since it uses less digits than its factorization.

1387320951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86546.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1387320951 is about 37246.7575904266. The cubic root of 1387320951 is about 1115.3015736642.

The spelling of 1387320951 in words is "one billion, three hundred eighty-seven million, three hundred twenty thousand, nine hundred fifty-one".