3620723261 has 2 divisors, whose sum is σ = 3620723262. Its totient is φ = 3620723260.

The previous prime is 3620723237. The next prime is 3620723263. The reversal of 3620723261 is 1623270263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2337722500 + 1283000761 = 48350^2 + 35819^2 .

It is a cyclic number.

It is not a de Polignac number, because 3620723261 - 2²² = 3616528957 is a prime.

Together with 3620723263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3620723263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810361630 + 1810361631.

It is an arithmetic number, because the mean of its divisors is an integer number (1810361631).

Almost surely, 2^3620723261 is an apocalyptic number.

It is an amenable number.

3620723261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3620723261 is an equidigital number, since it uses as much as digits as its factorization.

3620723261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 3620723261 is about 60172.4460280617. The cubic root of 3620723261 is about 1535.5540602976.

The spelling of 3620723261 in words is "three billion, six hundred twenty million, seven hundred twenty-three thousand, two hundred sixty-one".