615220097 has 2 divisors, whose sum is σ = 615220098. Its totient is φ = 615220096.

The previous prime is 615220093. The next prime is 615220121. The reversal of 615220097 is 790022516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605209201 + 10010896 = 24601^2 + 3164^2 .

It is a cyclic number.

It is not a de Polignac number, because 615220097 - 2² = 615220093 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (615220091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307610048 + 307610049.

It is an arithmetic number, because the mean of its divisors is an integer number (307610049).

Almost surely, 2^615220097 is an apocalyptic number.

It is an amenable number.

615220097 is a deficient number, since it is larger than the sum of its proper divisors (1).

615220097 is an equidigital number, since it uses as much as digits as its factorization.

615220097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 615220097 is about 24803.6307221342. The cubic root of 615220097 is about 850.5049350518.

The spelling of 615220097 in words is "six hundred fifteen million, two hundred twenty thousand, ninety-seven".