1965439501 has 2 divisors, whose sum is σ = 1965439502. Its totient is φ = 1965439500.

The previous prime is 1965439433. The next prime is 1965439559. The reversal of 1965439501 is 1059345691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1892337001 + 73102500 = 43501^2 + 8550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1965439501 - 2⁹ = 1965438989 is a prime.

It is a super-2 number, since 2×1965439501² = 7725904864182258002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1965439601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982719750 + 982719751.

It is an arithmetic number, because the mean of its divisors is an integer number (982719751).

Almost surely, 2^1965439501 is an apocalyptic number.

It is an amenable number.

1965439501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965439501 is an equidigital number, since it uses as much as digits as its factorization.

1965439501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 1965439501 is about 44333.2775801654. The cubic root of 1965439501 is about 1252.6215915093.

The spelling of 1965439501 in words is "one billion, nine hundred sixty-five million, four hundred thirty-nine thousand, five hundred one".