971280399 has 16 divisors (see below), whose sum is σ = 1364334080. Its totient is φ = 612930240.

The previous prime is 971280389. The next prime is 971280419. The reversal of 971280399 is 993082179.

It is not a de Polignac number, because 971280399 - 2¹³ = 971272207 is a prime.

It is a super-2 number, since 2×971280399² = 1886771226963198402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971280319) 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, 69219 + ... + 82059.

It is an arithmetic number, because the mean of its divisors is an integer number (85270880).

Almost surely, 2^971280399 is an apocalyptic number.

971280399 is a deficient number, since it is larger than the sum of its proper divisors (393053681).

971280399 is a wasteful number, since it uses less digits than its factorization.

971280399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14190.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 971280399 is about 31165.3717930655. The cubic root of 971280399 is about 990.3336626570. Note that the first 3 decimals are identical.

The spelling of 971280399 in words is "nine hundred seventy-one million, two hundred eighty thousand, three hundred ninety-nine".