1972790407 has 4 divisors (see below), whose sum is σ = 2254617616. Its totient is φ = 1690963200.

The previous prime is 1972790401. The next prime is 1972790419. The reversal of 1972790407 is 7040972791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7040972791 = 4157 ⋅1693763.

It is a cyclic number.

It is not a de Polignac number, because 1972790407 - 2¹¹ = 1972788359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972790401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140913594 + ... + 140913607.

It is an arithmetic number, because the mean of its divisors is an integer number (563654404).

Almost surely, 2^1972790407 is an apocalyptic number.

1972790407 is a deficient number, since it is larger than the sum of its proper divisors (281827209).

1972790407 is an equidigital number, since it uses as much as digits as its factorization.

1972790407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281827208.

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 1972790407 is about 44416.1052659956. The cubic root of 1972790407 is about 1254.1812847181.

The spelling of 1972790407 in words is "one billion, nine hundred seventy-two million, seven hundred ninety thousand, four hundred seven".