61620701 has 2 divisors, whose sum is σ = 61620702. Its totient is φ = 61620700.

The previous prime is 61620649. The next prime is 61620709. The reversal of 61620701 is 10702616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57002500 + 4618201 = 7550^2 + 2149^2 .

It is a cyclic number.

It is not a de Polignac number, because 61620701 - 2¹⁴ = 61604317 is a prime.

It is a super-2 number, since 2×61620701² = 7594221583462802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61620709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30810350 + 30810351.

It is an arithmetic number, because the mean of its divisors is an integer number (30810351).

Almost surely, 2^61620701 is an apocalyptic number.

It is an amenable number.

61620701 is a deficient number, since it is larger than the sum of its proper divisors (1).

61620701 is an equidigital number, since it uses as much as digits as its factorization.

61620701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 61620701 is about 7849.8854131764. The cubic root of 61620701 is about 394.9803996043.

The spelling of 61620701 in words is "sixty-one million, six hundred twenty thousand, seven hundred one".