1900620061 has 2 divisors, whose sum is σ = 1900620062. Its totient is φ = 1900620060.

The previous prime is 1900620053. The next prime is 1900620089. The reversal of 1900620061 is 1600260091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1190664036 + 709956025 = 34506^2 + 26645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1900620061 - 2³ = 1900620053 is a prime.

It is a super-2 number, since 2×1900620061² = 7224713232551287442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1900620461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950310030 + 950310031.

It is an arithmetic number, because the mean of its divisors is an integer number (950310031).

Almost surely, 2^1900620061 is an apocalyptic number.

It is an amenable number.

1900620061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900620061 is an equidigital number, since it uses as much as digits as its factorization.

1900620061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1900620061 is about 43596.1014426749. The cubic root of 1900620061 is about 1238.6970490457.

The spelling of 1900620061 in words is "one billion, nine hundred million, six hundred twenty thousand, sixty-one".