620869541 has 2 divisors, whose sum is σ = 620869542. Its totient is φ = 620869540.

The previous prime is 620869489. The next prime is 620869603. The reversal of 620869541 is 145968026.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409050625 + 211818916 = 20225^2 + 14554^2 .

It is a cyclic number.

It is not a de Polignac number, because 620869541 - 2²⁶ = 553760677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620869141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310434770 + 310434771.

It is an arithmetic number, because the mean of its divisors is an integer number (310434771).

Almost surely, 2^620869541 is an apocalyptic number.

It is an amenable number.

620869541 is a deficient number, since it is larger than the sum of its proper divisors (1).

620869541 is an equidigital number, since it uses as much as digits as its factorization.

620869541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 620869541 is about 24917.2538815978. The cubic root of 620869541 is about 853.1003461252.

The spelling of 620869541 in words is "six hundred twenty million, eight hundred sixty-nine thousand, five hundred forty-one".