1972402447 has 2 divisors, whose sum is σ = 1972402448. Its totient is φ = 1972402446.

The previous prime is 1972402379. The next prime is 1972402463. The reversal of 1972402447 is 7442042791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1972402447 - 2²³ = 1964013839 is a prime.

It is a super-3 number, since 3×1972402447³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972402477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986201223 + 986201224.

It is an arithmetic number, because the mean of its divisors is an integer number (986201224).

Almost surely, 2^1972402447 is an apocalyptic number.

1972402447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972402447 is an equidigital number, since it uses as much as digits as its factorization.

1972402447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 1972402447 is about 44411.7377165091. The cubic root of 1972402447 is about 1254.0990654634.

The spelling of 1972402447 in words is "one billion, nine hundred seventy-two million, four hundred two thousand, four hundred forty-seven".