1001978495 has 16 divisors (see below), whose sum is σ = 1386989568. Its totient is φ = 680647200.

The previous prime is 1001978489. The next prime is 1001978503. The reversal of 1001978495 is 5948791001.

It is not a de Polignac number, because 1001978495 - 2⁶ = 1001978431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130031 + ... + 137520.

It is an arithmetic number, because the mean of its divisors is an integer number (86686848).

Almost surely, 2^1001978495 is an apocalyptic number.

1001978495 is a deficient number, since it is larger than the sum of its proper divisors (385011073).

1001978495 is a wasteful number, since it uses less digits than its factorization.

1001978495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267670.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1001978495 is about 31654.0438964755. The cubic root of 1001978495 is about 1000.6590638727.

The spelling of 1001978495 in words is "one billion, one million, nine hundred seventy-eight thousand, four hundred ninety-five".