347701640621 has 2 divisors, whose sum is σ = 347701640622. Its totient is φ = 347701640620.

The previous prime is 347701640617. The next prime is 347701640633. The reversal of 347701640621 is 126046107743.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182816104900 + 164885535721 = 427570^2 + 406061^2 .

It is a cyclic number.

It is not a de Polignac number, because 347701640621 - 2² = 347701640617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (347701600621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173850820310 + 173850820311.

It is an arithmetic number, because the mean of its divisors is an integer number (173850820311).

Almost surely, 2^347701640621 is an apocalyptic number.

It is an amenable number.

347701640621 is a deficient number, since it is larger than the sum of its proper divisors (1).

347701640621 is an equidigital number, since it uses as much as digits as its factorization.

347701640621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 347701640621 in words is "three hundred forty-seven billion, seven hundred one million, six hundred forty thousand, six hundred twenty-one".